Biomaterials Science
·
2015
·Vol. 3
·期 7
·1147-1156
·
IF 3.831
Minghui Zan,Junjie Li,Mingming Huang,Shanqing Lin,Dan Luo,Shizhong Luo,Zhishen Ge
Near-infrared (NIR) light-triggered drug release systems are promising for drug delivery applications in view of the advantages of NIR light, which include high tissue penetration and low damage. In this report, we developed nanogels (NGs) by supramolecular self-assembly from adamantine (AD)-conjugated copolymer, poly[poly(ethylene glycol)monomethyl ether metharcylate]-co-poly(N-(2-hydroxypropyl)methacrylamide)-co-poly(N-adamantan-1-yl-2-methacrylamide) (PPEGMA-co-PHPMA-co-PADMA), and β-cyclodextrin (β-CD)-functionalized poly(amidoamine) (PAMAM) dendrimer based on the host–guest interaction of the AD and β-CD moieties, and they were used to encapsulate indocyanine green (ICG) and doxorubicin (DOX) for combined photothermal-chemotherapy. NGs simultaneously loading ICG and DOX (DINGs) showed significant photothermal effects and stimuli-triggered drug release under NIR laser irradiation by the photothermal-induced relaxation or dissociation of the NGs. In vitro cytotoxicity evaluation of DINGs under NIR irradiation demonstrated the synergistic effects of hyperthermia, photothermal-triggered drug release, and chemotherapy. In vivo investigation revealed their high accumulation in tumor tissue and significant tumor growth suppression under NIR irradiation. These NIR light-triggered drug release NGs represent efficient and promising anticancer drug vectors for the combined photothermal-chemotherapy of cancer to maximize therapeutic efficacy and minimize side effects.
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JOURNAL OF CATALYSIS
·
2018
·
IF 6.759
Juanjuan Jin,Changjun Yang,Bingguang Zhang,Kejian Deng
A highly efficient oxidation of amines including primary and secondary amines into imines using O 2 as the oxidant was realized by cobalt tetra(2-hydroxymethyl-1,4-dithiin)porphyrazine (CoPz(hmdtn) 4 ) under irradiation of visible light ( λ ≥ 420 nm). Particularly, the photocatalytic selective oxidation of benzylamine into N -benzylidenebenzylamine was thoroughly studied in order to get more insight into the reaction kinetics and mechanism for the oxidation of amine. The photocatalytic oxidation of benzylamine was observed to follow pseudo-first-order reaction kinetics. Moreover, a reasonable linear relationship between the log( k X / k H ) values and the Brown-Okamoto constant ( σ + ) parameters was obtained for oxidation of para - and meta -substituted benzylamines. Besides imine, the presence of other intermediate products such as NH-imine and H 2 O 2 was further evidenced in this photocatalytic system. Additionally, the reactive oxygen species (ROSs) generated in this photocatalytic process were confirmed by electron spin resonance (ESR) technique. The possible photocatalytic transformation pathway of amine into imine was also proposed, involving the dehydrogenation of amine to form NH-imine and the nucleophilic addition of NH-imine by free amine to afford the final imine.
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CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Zhenda Liang,Haiqing Wang,Kena Zhang,Ge Ma,Lishan Zhu,Li Zhou,Bing Yan
Low-cost MnO 2 has been vigorously investigated in the field of catalysis. However, high amount of MnO 2 usually needs to be used in the disinfection process owing to their low photocatalytic activity. In this work, modification of MnO 2 with zeolitic imidazole framework-8 (ZIF-8) for improving the photocatalytic bactericidal performance was explored for the first time. Specifically, MnO 2 /ZIF-8 exhibited complete inactivation of multi-drug resistant Escherichia coli ( E. coli) at a low concentration (3.24 μg/mL) with simulated solar irradiation. The 1 O 2 rather than O 2 − or OH was identified as the major reactive species for the bacterial inactivation. Mechanistic studies indicated that the superior bactericidal property of MnO 2 /ZIF-8 than the pristine material could be ascribed to the increased surface oxygen vacancies (OVs) amount and an inhibited electron and hole recombination. This study provides a novel type of photocatalyst for antibacterial application and may shed light on designing MnO 2 based low-cost nanocomposites with photocatalytic bactericidal capability for the practical water disinfection treatment.
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SOLAR ENERGY
·
2020
·
IF 4.608
Yi Wei,Huailong Chu,Baoquan Chen,Yuyang Tian,Xichuan Yang,Bin Cai,Yongfei Zhang,Jijun Zhao
Two-dimensional Ruddlesden-Popper perovskites (2D-RPPs) have attracted attention due to their superior moisture stability. In this study, we prepared and characterized a new group of 2D perovskites with cyclohexane methylamine (CMA + ) as a spacer cation. The compounds (CMA) 2 (MA) n−1 Pb n I 3n+1 ( n = 1, 2, 3, and 4) showed high self-assembly (where MA is CH 3 NH 3 ), which allowed for high-quality films to be deposited through the one-step spin-coating method in ambient air. Hot-casting technique, additives, and glove box were not required in the fabrication process. The bandgaps of this group of compounds can be varied from 2.36 eV for (CMA) 2 PbI 4 ( n = 1) to 1.52 eV for MAPbI3 ( n = ∞) with increasing n value. Moreover, we found that the thin films of (CMA) 2 (MA) n−1 Pb n I 3n+1 showed considerable stability in moisture and thermal tests. We successfully inserted these new 2D-RPPs in solar cells, and obtained the best power conversion efficiency of 10.66%, with an open-circuit voltage ( V oc ) of 1.00 V, and a short-circuit current density ( J sc ) of 16.99 mA/cm 2 for our first-generation device containing (CMA) 2 (MA) 3 Pb 4 I 13 ( n = 4). The CMA-based devices exhibited superior long-term stability, the unencapsulated (CMA) 2 (MA) 3 Pb 4 I 13 solar cell retained nearly 95% of its initial efficiency when exposed to ambient conditions with a 60% relative humidity for 1500 h.
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Photonics
·
2025
·Vol. 12
·期 12
·
IF 1.9
Yangyang Guo,Fuwen Shi,Bo Li
The NV center in diamonds has been widely employed in quantum sensing, quantum computing, and bioimaging due to its controllable ground-state spin, detectable magnetic resonance, excellent photostability, favorable biocompatibility, and chemical inertness. However, conventional excitation using 532 nm green light still exhibits certain limitations in practical applications. To address this, we propose a novel NV center excitation method based on the upconversion of near-infrared light to green emission. Through the synthesis of molybdenum-doped NaYF4: 20% Yb3+, 1.5% Er3+upconversion materials, efficient excitation of NV centers has been achieved. Both UC-LED luminescence spectroscopy and ODMR measurements confirm that the green light generated via the upconversion process exhibits sufficient intensity to effectively excite NV centers. Meanwhile, the characteristic sharp emission peaks of rare-earth upconversion materials eliminate the need for optical filters, facilitating device miniaturization, and a miniaturized UC-LED sensor has been developed.
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SENSORS AND ACTUATORS A-PHYSICAL
·
2025
·
IF 4.9
Chuang Wang,Quanwang Niu,Qihang Bian,Yanyan Bu,Bing Chen,Xiangfu Wang
Photoactuated logic switches, which translate light signals into logic operations via mechanical deformation, represent an emerging area of interest for unconventional computing. This work presents a graphene/polydimethylsiloxane (graphene/PDMS)-based photoactuated logic system capable of performing complex optical logic operations. A light-responsive soft switch was designed based on the photothermal and mechanical response of the graphene/PDMS composite. This switch exhibited reversible deformation and maintained stable operation over thousands of cycles under 980 nm near-infrared (NIR) light. The switch was further integrated into seven fundamental, optically-controlled logic gates (AND, OR, NOT, NAND, NOR, XOR, XNOR) that operated under low-power NIR illumination. These gates were subsequently assembled into a 1-bit full adder, demonstrating the feasibility of constructing more complex, light-driven logic circuits from photoactuated materials.
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ACS Photonics
·
2025
·
IF 6.7
Shuangyu Wang,Menglu Chen,Man Zhao,Dayong Jiang,Qun Hao,Qingcheng Liang,Rui Deng,Haoming Wei,Yuhan Duan
Self-powered photodetectors with bipolar photocurrent characteristics show promising potential for secure optical communication applications. However, ensuring the confidentiality of critical information remains a key challenge when facing potential interception by multiple eavesdroppers. In this study, we developed a self-powered photodetector based on a P3HT:PC61BM (BHJ)/PEDOT:PSS/ZnO architecture that exhibits incident-light-modulated bipolar photocurrent response. This unique bipolar behavior originates from the synergistic effects between the ultraviolet-absorbing ZnO layer and the visible-absorbing BHJ. The photodetector features an n-p-n band structure created by two opposing built-in electric fields at the n-ZnO/p-PEDOT:PSS and p-PEDOT:PSS/n-BHJ interfaces, which drive photocurrents in opposite directions. This distinctive configuration enables the photodetector to generate positive output signals under ultraviolet light irradiation (380 nm) and negative signals under visible light irradiation (620 nm) at 0 V bias, with remarkable responsivities of 14 and 6 mA W–1, respectively. By utilizing positive ultraviolet signals as valid data carriers and negative visible signals as interference, we successfully established a highly efficient and stable secure optical communication system. This innovative approach demonstrates significant potential for advanced information encryption applications while maintaining simple device architecture.
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Advanced Optical Materials
·
2025
·Vol. 13
·期 27
·e01552
·
IF 7.2
Yongjie Wang,Yingju Yan,Dongshuo Li,Qingzhou Bu,Guotao Xiang,Li Li,Sha Jiang,Xianju Zhou,Qilong Gao,Yaroslav Zhydachevskyy,Mikhail G. Brik,Andrzej Suchocki
Broadband near-infrared (NIR) phosphors with superior thermal stability are critical enablers of high-power NIR pc-LEDs, emerging as essential light sources for NIR spectroscopy applications. In this work, an unprecedented high-temperature negative thermal quenching (NTQ) phenomenon persisting up to 500 K is reported in Cr 3+ -activated ScF 3 phosphors, which emit broadband NIR emission in the 700–1200 nm (λ em = 850 nm, FWHM = 132 nm). The theoretical calculations employing the Exchange-Charge Model (EMC) for crystal field parameters of Cr 3+ ions in [ScF 6 ] octahedral sites remain in perfect agreement with the experimental results. Critically, Yb 3+ -codoping enables efficient Cr 3+ → Yb 3+ energy transfer, achieving substantial spectral broadening (FWHM = 254 nm) and significantly enhanced thermal stability. The temperature-dependent X-ray diffraction (XRD) and theoretical calculations reveal that anisotropic F-atom vibrations drive negative thermal expansion (NTE) in cubic ScF 3 , distorting [ScF 6 ] octahedra. It is demonstrated that synergistic electron-phonon coupling and NTE-driven structural dynamics underpin the superior thermal stability of NIR emission. These findings establish a design paradigm for new broadband NIR phosphors with outstanding thermal stability for next-generation high-power NIR pc-LED applications.
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JOURNAL OF MOLECULAR STRUCTURE
·
2025
·
IF 4.7
Linkai Zhao,Jing Zhao,Zhao Mo,Ziyi Wang,Zhaoli Xue,Lei Feng,Long Zhao
Metalloporphyrin-coated semiconductor nanoparticals may be one potential option for photodegradation of organic pollutants in watertreatment. To examine the function of lone pair electron-containing substituents in photocatalytic interfacial charge transfer mechanism, we synthesized three meso‑ substituted zinc porphyrins (Znpors) containing 4-pyridyl, 3-pyridyl and phenyl, denominated as 4-Pyr-Znpor, 3-Pyr-Znpor and Ben-Znpor, respectively. Density functional theory (DFT) calculations revealed similar electronic structrues and bandgaps of the three porphyrins, with clearly negaitive charges on the isosurface of pyridine substituents. Photoelectrochemical and impedance measurements reveal that 4-Pyr-Znpor/TiO 2 and 3-Pyr-Znpor/TiO 2 exhibit greater photocurrent response and lower charge transfer resistance as compared to Ben-Znpor/TiO 2 . Photodegradation of the organic pollutant AB1 using the composites suggests efficient photocatalysis ability of the three porphyrin-sensitized TiO 2 nanoparticals, with 4-Pyr-Znpor/TiO 2 exhibiting the highest degradation rate at the first 30 min. Our findings suggest that the pyridine substituent may attract holes and facilitate the charge separation efficiency, therefore enhancing the photocatalytic efficiency.
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JOURNAL OF ORGANIC CHEMISTRY
·
2023
·
IF 3.6
Yi Fang,Chunyi Liu,Jie Tang,Zheng Pei,Zhengping Chen
A photocatalytic synthesis of difluoromethylated selenides from selenosulfonates is described here. Bench-stable difluoromethyl phosphonium salt [Ph3PCF2H]Br reacts smoothly with selenosulfonates to give a series of functionalized difluoromethylated selenides in moderate to good yields via a radical process. This protocol is free of a stoichiometric base and reductant, has tolerance of functional groups, and has successful late-stage modification of bioactive molecules, which provides facile access to molecules of pharmaceutical relevance.
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ANALYST
·
2019
·Vol. 145
·期 2
·424-433
·
IF 4.019
Zhen Lin,Shu Luo,Dafen Xu,Shijun Liu,Namei Wu,Wensong Yao,Xiaomin Zhang,Linlin Zheng,Xinhua Lin
In this study, silica-polydopamine hybrids (SPDA) were fabricated by a facile and one-step heating method using dopamine and (3-aminopropyl)triethoxysilane (APTES) as the reaction reagents. It was firstly found that light illuminated-SPDA could oxidize colorless 3,3′,5,5′-tetramethylbenzidine (TMB) to produce blue ox-TMB. The coloration process was quenched very efficiently via the addition of Cu2+. The presence of pyrophosphate ion (PPi) in the solution of light-illuminated SPDA-Cu2+-TMB induced the recovery of the coloration process. The recovery occurred because PPi coordinated with Cu2+, effectively sequestering the ion from SPDA. A calibration curve was developed that is related to the extent of absorption recovery to [PPi], making the SPDA-Cu2+-TMB system a sensitive and selective turn-on sensor for PPi detection. The limit-of-detection (LOD) for PPi was 0.06 μmol L−1 (S/N = 3) with a linear dynamic range of 0.1–30 μmol L−1 and the calibration curve of linear equation is given as: y = 0.00146x + 0.05096 (r = 0.9974). The proposed method has been successfully applied to the detection of PPi in human serum with satisfactory recovery. The simplicity, low cost, high sensitivity, good reproducibility and excellent selectivity of the PPi detection platform based on the light-induced oxidase mimicking property of SPDA makes it promising for further applications of SPDA in chemo/biosensing.
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CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Yongfeng Liu,Tianting Ge,Mingyu Guo,Qingyu Xie,Yanli Liu,Dongdong Yan,Shengnan Tian,Zhe Zhang,Min Zhou,Zonglin Gu
Perovskite-matrix embedding boosts CsPbBr₃ PeQD PLQY from 45.4% to 81.3%. • Matrix embedding reduces trap-state densities and balances carrier transport. • PeQDs gain enhanced stability against air, heat, and UV irradiation. • PeLED achieves 6.8× EQE (6.0%) and 9.7× lifetime (1254 s) enhancements. Halide perovskite quantum dots (PeQDs) are promising emitters for light-emitting diodes (LEDs), yet translating their excellent solution-state luminescence into high-quality films remains challenging because of high defect density and poor film stability. Here, to solve these issues, a perovskite-matrix embedding strategy is developed by embedding CsPbBr 3 PeQDs into a perovskite matrix. The matrix not only retains PeQD-related emissive characteristics, but also suppresses nonradiative recombination and trap-assisted excited-state decay, boosting photoluminescence quantum yield from 45.4% to 81.3%. This strategy contributes to forming a uniform and dense emissive layer, reducing effective electron/hole trap-state densities, and improving carrier-transport balance. Besides, matrix embedding enhances the thermal and environmental stability of PeQDs against air, heat, and ultraviolet irradiation. Benefiting from such merits, the resulting perovskite LED exhibits significantly improved electroluminescent performance: maximum luminance by a factor of 2.8 to 4245 cd m −2 , external quantum efficiency by a factor of 8.4 to 6.7%, and operational lifetime by a factor of 16.5 to 1745 s under constant-current operation at 100 cd m −2 . This strategy provides a viable route for efficient and stable PeQD-based LEDs.
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