JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2022
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IF 5.141
Ying Gong,Shuting Fang,Yijie Zheng,Hongyu Guo,Fafu Yang
Although some detection methods for oxalic acid have been reported, the rapid, simple and on-site detection on oxalic acid was rarely presented. In this work, a “turn-on” fluorescence sensor for oxalic acid was realized by the simple and on-site procedure in aqueous media. A tetra-cyanostilbene macrocycle was synthesized by simple “2 + 2” condensation in 72 % yield. It displayed the strong “turn-on” blue fluorescence on selectively detecting oxalic acid among various ions and biomolecules. It possessed the high sensing sensitiveness with the detection limit of 3.82 × 10 −6 M. The sensing mechanism was clarified by pH influence on complexation, fluorescence Jobs’ plot, MS spectra, and 1 H NMR spectra, confirming that non-dissociated oxalic acid was bound in the cavity of the macrocycle based on hydrogen bonds. This sensing ability for oxalic acid was successfully applied in test paper, on-site detection for real samples of taros and rust treatment, suggesting the good application prospect in the rapid, simple and on-site detection for oxalic acid in daily life and industry.
研究领域:
分析化学
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环境科学
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材料科学
✓ 已验证
DOI
高影响因子
Advanced Optical Materials
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2023
·Vol. 11
·期 13
·2203087
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IF 9
Shuang Ma,Hua Sun,Jinqiu Chen,Yue Yu,Haolin Lu,Shuai Wang,Jing Zhang,Jianfeng Zhao,Guankui Long,Xue-Dong Wang
In this paper, three new donor–acceptor complex forms (zBC) containing a helical-shape dibenzocarbazole analog (DBCz) as the electron donor and 1,2,4,5-tetracyanobenzene (TCNB) as the electron acceptor via a simple solution-processing strategy are reported. The beginning components self-assembled into supramolecular frameworks with glamorous alignment modes and different molar ratios: ≈1:1 P or M-enantiomer for α-cocrystal, alternated P/M-column stacking in mesmeric 2:3 β-cocrystal, and segregated stacking of γ-cocrystal. As a result, α-cocrystal exhibits bright solid-state red fluorescent, β-cocrystal shows significant optical waveguide behavior with a low optical loss coefficient of ≈0.018 dB µm −1 , and no visual light emission is observed for γ-cocrystal under ultraviolet radiation. Interestingly, the α-zBC crystal is not only emissive but also chiroptically active with dissymmetry factor ( g lum ) of 0.004. This study on chiral stacking tailoring paves a way for functional design of organic charge-transfer complex toward application in high-performance organic optoelectronics.
研究领域:
有机化学
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材料科学
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光电子学
✓ 已验证
DOI
高影响因子
DYES AND PIGMENTS
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2021
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IF 4.889
Qian Zhou,Huitian Du,Zhen Chen,Yuan Yu,Junfeng Ren,Shenghao Han,Jihui Fan,Zhiyong Pang
Near-infrared two-photon absorption (TPA) molecules designed based on intramolecular charge-transfer (CT) interactions have been widely investigated during the last few decades; however, studies on supramolecular TPA materials based on intermolecular CT interactions are quite rare. In this work, cocrystals of acridine and 1,2,4,5-tetracyano-benzene were successfully prepared by self-assembly. The cocrystals show yellow emission centered at ∼540 nm with a solid-state photoluminescence quantum yields (PLQY) of 22.48%. Two-photon excited fluorescence (TPEF) measurements show that the cocrystals display wide-window TPEF that is absent in their individual components. Optical absorption analysis indicate that the fluorescence is originated from excitation from the ground states to CT exciton states instead of exciton states of donor or acceptor molecules. This work may facilitate further two-component nonlinear optical material design and applications.
研究领域:
材料科学
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光学
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化学
✓ 已验证
产品关联
DOI
高影响因子
CRYSTENGCOMM
·
2024
·
IF 2.6
Wenxiu Yao,Pengfei Wu,Yidan Xie,Xinyu Shen,Shuwei Xia,Liangmin Yu
A series of charge transfer cocrystals with fluorescent properties involving 1,2,4,5-tetracyanobenzene (TCNB, C10H2N4) as the acceptor, fluorene (FR, C13H10) and its bromide 2-bromofluorene (2-BrFR, C13H9Br), carbazole (CZ, C12H9N) and its bromide 2-bromocarbazole (2-BrCZ, C12H8BrN) as donors were synthesized via cocrystal design strategies. The formation mechanism of the crystal structure was explored by density functional theory at molecular level. The stacking structure of the cocrystal was formed by the combined interaction of charge transfer interactions, π-π interactions and hydrogen bonding. N atom of donors in TCNB-CZ and TCNB-2-BrCZ could enhance the charge transfer, appear as a red shift of the fluorescence emission wavelength. Conversely, Br atom in TCNB-2-BrFR and TCNB-2-BrCZ weaken the charge transfer, giving a blue shift in fluorescence emission spectrum. The four new cocrystals exhibit tunable luminescence from green (529 nm) to yellow (552 nm) and to red (604 nm and 614 nm). It was found that the introduction of N and Br atoms in the assembly units can not only regulate the luminescence range of the cocrystals, but also adjust the luminescence efficiency, which provides a strategy for the development of promising organic luminescent materials.
研究领域:
材料科学
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有机化学
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光化学
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晶体工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF LUMINESCENCE
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2022
·
IF 4.171
Qian Zhou,Yuan Yu,Huitian Du,Chenghao Liu,Junfeng Ren,Shenghao Han,Zhiyong Pang
Organic charge-transfer cocrystals exhibit fantastic physical properties owning to their multi-component synergistic and collective effect. In spite of the abundant material supplies, the cocrystals people prepared so far are far less than expectation. Here, we reported the preparation, structure and optical properties of a mixed stacked cocrystal of 2,2':6′,2″-terpyridine and 1,2,4,5-tetracyanobenzene. The structural and optical properties were analyzed by using single-crystal X-ray diffraction (SCXRD), FTIR, Raman, optical absorption and emission spectra experimentally and the molecular electrostatic potential (MEP), Hirshfeld surface , the reduced density gradient (RDG), frontier molecular orbitals (FMO) theory, inter-fragment charge transfer (IFCT) analysis and time dependent density functional theory (TD-DFT) theoretically. The TTC sample exhibits strong up-conversion luminescence that is absent in their individual components. Theoretical analysis indicates that the NLO properties of TTC may be due to a significant increase in two-photon transition probabilities δ TPA related to intermolecular charge transfer (CT) interactions. Our results may be helpful for a better understanding of NLO mechanism in ground state CT cocrystals.
研究领域:
材料科学
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物理化学
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光学
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理论化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）