ACS Sustainable Chemistry & Engineering
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2026
·Vol. 14
·期 30
·13689-13698
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IF 7.6
Xu Yanling,Zhou Yue-Wen,Cai Zhen-Feng,Liu Qinlei
Imines are valuable intermediates and building blocks in fine chemicals and pharmaceutical synthesis. Oxidative coupling of amines represents an attractive route to imine formation. However, conventional methods rely on metal catalysts, external oxidants, or thermal and photochemical activation, involving multistep processes, harsh conditions, and environmental concerns. Here, we report that amines undergo oxidative coupling to imines within aqueous microdroplets at room temperature, without any catalyst or oxidant. The molecular structures of products were confirmed by mass spectrometry, UV–vis spectroscopy, and 1 H NMR analysis. Substrate scope studies revealed that the microdroplet system enables both self-coupling and cross-coupling of amines, highlighting its broad generality. Radical trapping experiments and density functional theory calculations suggest reactive oxygen species, including hydroxyl radicals and hydrogen peroxide, are likely involved in the oxidative process occurring at the microdroplet interface. This work introduces a simple, rapid, and environmentally benign strategy for imine synthesis and underscores the unique potential of microdroplet chemistry in advancing green oxidative coupling reactions.
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APPLIED SURFACE SCIENCE
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2026
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IF 6.6
Yi Wei,Jiawen Song,Jingwei Mao,Zhengzong Lu,Chao Yang,Lifeng Piao,Xue Zhang,Yefu Liu
Nanosheets with 1–8 atomic layer thickness are realized by dual-ligand engineering. • Tunable emission from 527 to 754 nm achieved through quantum confinement effects. • CMAI-capped nanosheets exhibit high stability under laser irradiation and in water. • Ammonium establishes stronger bonding on surface and blocks vertical crystal growth. • This method overcomes phase separation and holds promise for optoelectronic devices. Achieving tunable emission in single-halide perovskite nanocrystals via size control remains challenging, while mixed-halide alternatives suffer from inherent instability. Here, we establish a synergistic ligand engineering strategy for the controlled synthesis of atomically layered quasi-2D perovskite nanosheets in pure-iodide systems. By systematically comparing the roles of amine (OLA, PEA) and ammonium (PEAI, CMAI) ligands, we demonstrate that PEAI and CMAI terminate vertical growth via strong surface binding from the –NH 3 + group, while OLA prevents nanocrystal aggregation, which is a complementary function essential for achieving well-dispersed, ultrathin nanosheets. Through combined ligand and solvent engineering, we achieve precise thickness control from n = 1 to n = 8 with tunable emission across 527–729 nm, a broader range than previously reported for single-halide colloidal perovskite nanosheets. Notably, CMAI-passivated n = 3 nanosheets exhibit superior stability, retaining 71% of initial PL in a 1:2 (v/v) aqueous environment after 35 min and 38.1% after 15 min of intense 405 nm laser irradiation (49 mW), significantly outperforming both OLA- and PEAI-based analogues. This work establishes a dual-ligand synergistic framework that overcomes the long-standing challenges of thickness control and spectral tunability in single-halide perovskite nanosystems, providing a generalizable strategy for designing stable, high-performance perovskite optoelectronic materials. © 2012 Published by Elsevier Ltd. Selection and/or peer-review under responsibility of Global Science and Technology Forum Pte Ltd. Download: Download high-res image (336KB) Download: Download full-size image
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Advanced Optical Materials
·
2026
·
IF 7.2
Ziwei Liu,Chunjian Li,Xiaobin Xie,Haiyan Li,Junjie Qin,Bohua Dong,Lixin Cao,Chenghui Xia
The synthesis of luminescent ternary AgInS 2 quantum dots (QDs) is typically constrained by slow reaction kinetics and uncontrolled defect formation, which compromise optical efficiency. Herein, a multi-ligand synergy strategy that enables ultrafast (30 s) cation exchange from Ag 2 S to AgInS 2 at room temperature is reported. Trioctylphosphine mediates rapid Ag + extraction and In 3+ coordination, while octylamine dynamically modulates the exchange kinetics. Crucially, 1-dodecanethiol passivates deleterious sulfur vacancies and promotes the formation of beneficial emissive defect complexes. Optical and compositional analyses collectively indicate that the luminescence likely originates from radiative recombination via donor–acceptor pairs (e.g., a silver vacancy and an indium-on-silver antisite defect), stabilized by the ligand shell. This cooperative mechanism achieves a 10 4 -fold kinetic acceleration and low-cost gram-scale production (<$63/mmol). After ZnS shelling, the QDs attain a photoluminescence quantum yield of 86% and yield luminescent solar concentrators with a power conversion efficiency of 2.86% and an optical efficiency of 8.85%. This work establishes a non-equilibrium synthesis paradigm that overcomes the traditional trade-off between speed and defect control in ternary chalcogenides.
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ACS Applied Nano Materials
·
2026
·
IF 5.8
Huan Tian,Feng-Lei Jiang
Perovskite nanocrystals (NCs) exhibit intrinsic chemical instability due to their ionic nature. This property renders them susceptible to structural degradation and optical performance deterioration upon exposure to various cations (both inorganic and organic ions). For instance, Cs+ can induce phase transformation and photoluminescence quenching in the CsPbBr3 NCs. In this work, we found that externally introduced metal cations exert diverse effects (classified as three types) on the structure and optical properties of CsPbBr3 NCs. Notably, certain cations, such as Zn2+ and Cd2+, can bind to the surface and shield nanocrystals against the detrimental effects of exogenous cations. The protection effects were observed by both optical spectroscopy and transmission electron microscopy. Pretreatment with both ZnBr2 and CdBr2 significantly enhances the resistance of CsPbBr3 NCs to structurally or optically detrimental exogenous cations (Cs+). Moreover, with didodecyldimethylammonium bromide (DDAB) simultaneously incorporated in this pretreatment, the pretreated CsPbBr3 NCs exhibit enhanced resistance to polar solvents (e.g., ethanol), manifesting as keeping stable and bright even when exposed to 20% (volume percentage) of ethanol. These three components (ZnBr2, CdBr2, and DDAB) exhibit complementary functions for chemical stability. This stability-preserving strategy is expected to enhance the robustness of perovskite NCs against complex chemical conditions encountered during the device fabrication process (solution processing and interlayer interface engineering) and operating environments.
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CHEMICAL ENGINEERING JOURNAL
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2026
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IF 12.5
Li Liao,Shuling Xiang,Biyou Bao,Guanglong Xu,Chengli Zhang,Qiang Wang,Zhenhu Cao,Wentao Chen,Hongtao Cao,Hongliang Zhang
Intelligent electrochromic systems that integrate energy storage with optical feedback are increasingly sought after to meet the demands of global energy transition and the burgeoning field of flexible electronics. Yet, the performance and reliability of flexible zinc-based electrochromic energy storage devices (EESDs) are often compromised by the limitations of conventional electrolytes, including poor interfacial stability, liquid leakage, and inadequate mechanical robustness. Herein, we report a high-performance flexible EESD based on a Prussian blue–zinc (PB–Zn) chemistry, enabled by a scalable blade-coated PB cathode and a quasi-solid-state electrolyte (QSSE) incorporating a semi-interpenetrating polymer network (semi-IPN) of poly(vinylidene fluoride- co -hexafluoropropylene) (PVDF-HFP) and ethoxylated trimethylolpropane triacrylate (EOTMPTA). The device delivers a high optical modulation of 74.49%, a coloration efficiency of 189.77 cm 2 C −1 , and outstanding cycling stability with 93.72% retention after 10,000 cycles, attributed to a stabilized electrode–electrolyte interface enabling highly reversible zinc electrochemistry. Moreover, the system demonstrates efficient self-powered operation when integrated with a solar cell (SC), highlighting its potential for energy-autonomous smart windows. Overall, this work establishes a material–interface co-design strategy that provides a promising pathway toward durable, high-performance, and self-sustaining electrochromic smart windows.
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ACS Photonics
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2026
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IF 6
Hang Xia,Luyao Lv,Xi Ran,Mohan Yuan,Xinzheng Lan
PbS colloidal quantum dots (CQDs) hold great promise in the next generation of low-cost, high-performance short-wave infrared (SWIR) photodetectors. Both the dark current and the spectral response, however, have been hampered by the preparation of semiconductor-grade PbS CQDs. Here, we report high-performance PbS CQD photodetectors by leveraging a monomer-assisted ligand exchange strategy. The resultant PbS CQD films show enhanced defect passivation evidenced by more than 1 order of magnitude increase in their exciton lifetime, which translated into photodetectors with record low dark current and high specific detectivity (D*). For a cutoff wavelength ∼1700 nm, ultralow dark current (21 nA/cm2 at −0.5 V) and a peak specific detectivity (D*) of 8.73 × 1012 Jones were achieved at 1650 nm, which are comparable to commercial InGaAs photodetectors. In addition, the implementation of this approach to large-sized PbS CQDs leads to broadband photodetectors with a cutoff wavelength of ∼2330 nm, a regime previously inaccessible to PbS CQDs. The monolithic integration of PbS CQD photodetectors with a 256 × 256 pixel thin-film transistor readout circuit enables infrared imaging through Si and Ge filters, validating the technology’s potential for broadband imaging applications.
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Light-Science & Applications
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2026
·Vol. 15
·期 1
·151
·
IF 24
Cui Yuhang,Zhu Danlei,Chen Jiawei,Dong Shuyue,Cheng Yuanzhuang,Liu Xiangyu,Yan Xinghua,Jin Zicong,Duan Lian,Xu Jian,Ma Dongxin
Perovskite quantum dot light-emitting diodes (QLEDs) offer superior efficiency and high colour purity, making them promising candidates for next-generation lighting and display technologies. However, fabricating the emissive perovskite quantum dot (QD) layer typically requires a protective atmosphere due to its air sensitivity, thereby increasing production costs and limiting industrial scalability. Here, we propose an ion-pair pinning strategy by using tetraalkylammonium triflate (NR 4 OTf) to enable ambient-air processing of formamidinium lead bromide (FAPbBr 3 ) QD films. The trifluoromethanesulfonic acid anions (OTf − ) hydrogen bond with FA + , inhibiting its detachment and passivating the uncoordinated Pb 2+ , while the tetraalkylammonium cations (NR 4 + ) serve as X-type ligands to inhibit deprotonation. This dual ion-pair pinning effect stabilises the QD lattice and provides surface resistance to moisture and oxygen, thereby improving the uniformity, stability, and optoelectronic performance of air-processed QD films. The as-constructed air-processed QLED achieves a high external quantum efficiency (EQE) of 21.3% and a peak luminance of over 3 × 10 4 cd m −2 at 529 nm with Rec. 2020 compliance (EQE of 23.9% and luminance of over 8 × 10 4 cd m −2 for the N 2 -processed QLED). Our work eliminates the reliance on inert gas protection in perovskite QLED fabrication, laying a foundation for their low-cost, large-scale manufacturing and expansion into diversified applications.
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ADVANCED FUNCTIONAL MATERIALS
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2026
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IF 19.9
Tangjun Zhang,Tao Liu,Desheng Zhan,Hongyi Tang,Xiaofei Qian,Hai Deng
Artificial organic synaptic transistors integrating sensing, memory, and learning capabilities have great potential for application in emerging neuromorphic intelligent vision systems. Herein, we propose an organic synaptic perovskite transistor (OSPT) based on fluorinated block copolymer, i.e. poly(heptafluorobutyl methacrylate)- block -poly(2-vinylpyridine) (PHFBMA- b -P2VP), that exhibits light-electric dual modal modulation for reconfigurable neuromorphic computing and logic integration. Rapid self-assembly of PHFBMA- b -P2VP at 80°C endows MAPbBr 3 quantum dots with the advantage of being templated in P2VP domains to form ordered nanocomposite floating gate at low temperature, which not only prevents the loss of captured charges, but also avoids the damage to device performance caused by perovskite quenching due to high temperature. The OSPT exhibits multilevel memory, broadband response from 280 nm to 740 nm, and extremely low power consumption of 1.92 fJ. Furthermore, the device can execute optoelectronic information memory and simulate a series of synaptic functions. Notably, the MNIST pattern recognition based on the OSPT reveals a high recognition accuracy of 94.8%. Meanwhile, this device is also capable of performing manipulated optoelectronic logic operation functions of “AND” and “OR”. This work advances the development of versatile integrated neuromorphic intelligent vision systems.
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INORGANIC CHEMISTRY
·
2025
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IF 4.7
Yuchao Huang,Di Li,Jie Guo,Zeyu Miao,Shuo Li,Ziqi Song,Wenxu Yin,Xiaoyu Zhang
Tin halide perovskites offer a lead-free alternative for optoelectronics, yet their strong tendency toward self-trapped exciton (STE) formation has hindered the development of color-pure emission. Here, we report a strategy to control the emission behavior of two-dimensional PEA2SnI4 nanoplatelets through a synergistic approach combining Sn2+ vacancy suppression and surface oxidation control. By introducing excess stannous oleate during synthesis, we suppress Sn vacancies, shifting the emission from broadband yellow (STE-dominated) to narrowband red (band-edge excitonic emission). Further narrowing is achieved by replacing conventional ligands with antioxidant surface ligands, stabilizing Sn2+ and eliminating residual traps. This approach yields highly luminescent PEA2SnI4 nanoplatelet colloidal solution with sharp red emission and a record-high quantum yield of 17.2%. Structural and spectroscopic analyses reveal a clear correlation between lattice distortion and electron–phonon coupling. Our findings offer a rational design strategy for defect-tolerant, lead-free quantum emitters with tunable excitonic properties.
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ACS Nano
·
2025
·
IF 16
Yu Lou,Haoran Wang,Zhicong Zhou,Miao Zeng,Zhongliang Yan,Xueying Yang,Pengfei Fu,Arui Huang,Dong Li,Tom Wu,Yang Bai,Hui-Ming Cheng
Pure-red perovskite light-emitting diodes (PeLEDs) are critical for next-generation displays, while existing systems based on mixed Br/I compositions, quasi-2D phases, or colloidal 0D quantum dots are still facing challenges in fulfilling the requirements of the Recommendation BT.2020 (Rec. 2020) red standard. CsPbI3 nanoplatelets (NPLs) whose bandgap depends on thickness-size are a promising candidate for pure-red light-emitting emitters, but their practical use as LEDs has been hampered by the metastability of the emissive CsPbI3 cubic phase. Here, we report the synthesis of stabilized γ-CsPbI3 NPLs with a tailored surface coordination by incorporating a trace amount of dimethyl sulfoxide (DMSO) and N,N’-dimethylpropyleneurea (DMPU) into the precursor. These ligands selectively coordinate with undercoordinated Pb2+ sites in [PbI6]4– octahedra through Lewis acid–base interactions, redistributing the electron density at Pb centers and inducing lattice distortion by the Pb–I–Pb bond angle torsion, thereby stabilizing the γ-phase. The complementary effect of the polarities and the coordination capacities of DMSO/DMPU guide anisotropic growth along the [100] direction, enabling atomic-precision control of the NPL thickness (4 monolayers) to tailor the quantum-confined pure-red emission. The resultant pure-red PeLEDs achieve Commission Internationale de l’Eclairage (CIE) coordinates of (0.708, 0.292), 100% compliance with the Rec. 2020 specification, as well as an external quantum efficiency (EQE) of over 12% and a superior operational lifetime with a half-lifetime (T50) of 360 min, representing the highest reported values for CsPbI3 NPL-based PeLEDs.
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HYDROMETALLURGY
·
2025
·
IF 5.3
Xuting Si,Shuai Wei,Yilin Yang,Yulu Li,Youcai Lu
The increasing demand for lithium resources has promoted significant advancements in lithium extraction and recovery technologies. This study introduces a series of novel aminophosphonic acid extractants with varying branched-chain structures, designed to enhance lithium recovery from spent battery leachates with high sodium interference. These bifunctional extractants, incorporating both phosphonic acid and amino groups, demonstrated notable efficiency and selectivity. Under optimal conditions, a single-stage extraction achieved a lithium extraction efficiency of 70 %, with a lithium‑sodium separation factor of 139. A four-stage countercurrent extraction process further elevated the lithium recovery to 99 %. The extraction mechanism was elucidated through Fourier-transform infrared (FT-IR) spectroscopy and 31 P nuclear magnetic resonance (NMR) spectroscopy, complemented by density functional theory (DFT) calculations. This research not only provides a feasible method for lithium extraction from high Na/Li ratio leachates but also offers useful insights for industrial applications, highlighting the potential of bifunctional extractants in sustainable lithium recovery.
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ACS Applied Nano Materials
·
2025
·
IF 5.5
Kairui Kuang,Xue Jiang,Chenhui Qian,Zhenming He,Liumei Su,Jialong Zhao,Bingsuo Zou,Zhentao Du
In the present work, the exploration of photoelectrochemical (PEC) photodetectors (PDs) based on Ag-doped ZnO/MoS2 nanorod arrays is reported. Ag-ion doping optimizes the band structure of ZnO, reduces interface defect states, promotes the formation of an internal electric field, and significantly improves the photoelectric performance and stability of ZnO/MoS2 heterojunction PEC PDs. The PD exhibits excellent photodetection behavior, with a high photocurrent density (684.08 μA·cm–2), responsivity (2.207 mA W–1), and detectivity (11.3 × 108 Jones) under white-light illumination with an intensity of 310 mW cm–2 and a bias voltage of 0.6 V, which are approximately 2.7, 2.7, and 4.2 times higher than those of pure ZnO/MoS2, respectively. Furthermore, Ag doping significantly improves the self-powered photoelectric performance of the device, demonstrating excellent photoresponse characteristics under zero bias. This study reveals the mechanism by which Ag-ion doping improves the performance of ZnO/MoS2 photodetectors, providing fundamental support for the development of high-performance photoelectrochemical photodetectors.
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