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Effect of Substitution Site on two-photon absorption and Excited States Properties of Lipid Droplets Detection NAPBr Dyes:a Theoretical Perspective

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Chinese Journal of Chemical Physics 2022年第4期35卷 673-684,I0150页

作者： Hong-yang Wang Xiao-fei Wang Jian-zhong Fan Yong Zhou Shandong Province Key Laboratory of Medical Physics and Image Processing Technology Institute of Materials and Clean EnergySchool of Physics and ElectronicsShandong Normal UniversityJinan 250014China Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates South China University of Technology Guangzhou 510640China

two-photon fluorescence dyes have shown promising applications in biomedical ***,the substitution site effect on geometric structures and photophysical properties of fluorescence dyes is rarely illustrated in *** this work,a series of new lipid droplets detection dyes are designed and studied,molecular optical properties and non-radiative transitions are *** intramolecular weak interaction and electron-hole analysis reveal its inner *** dyes are proven to possess excellent photophysical properties with high fluorescence quantum efficiency and large stokes shift as well as remarkable two-photon absorption cross *** work reasonably elucidates the experimental measurements and the effects of substitution site on two-photon absorption and excited states properties of lipid droplets detection NAPBr dyes are highlighted,which could provide a theoretical perspective for designing efficient organic dyes for lipid droplets detection in biology and medicine fields.

关键词： Substituting effect two-photon absorption cross section Non-radiative transition Fluorescence quantum efficiency

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Theoretical Study on One- and two-photon absorption Properties of PPV Derivative with Electron-Donor Phenylanthracene as Pendent Group

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Chinese Journal of Chemistry 2007年第4期25卷 465-471页

作者：赵亮牟丽杨国春苏忠民秦春生邵琛 Institute of Functional Material Chemistry Faculty of Chemistry Northeast Normal University Changchun Jilin 130024 China College of Environment Ecosystem and Engineering Changchun University Changchun Jilin 130022 China

Based on the equilibrium structures from quantum mechanics AM1 method, employing INDO/CI method and the sum-over-state （SOS） formula, the one-photon absorption （OPA） and two-photon absorption （TPA） properties as well as the second hyperpolarizabilities were discussed in detail for a kind of PPV derivative poly 2-（9-phenylanthracen-10-yl）-1,4-phenylenevinylene （P1）. The results indicate that the two-photon cross section （3） increases with the increasing of the number of repeating segment （n）, however only a slight increase corresponds to the increasing of molecular weight when the repeating unit number arrives at a certain number. From this point of view, the TPA cross section values of P1 were extrapolated through the linear fit of 3 value vs. 1/n. The δ value of P1 is as high as 181 GM （1 GM=10^-50 cm^4·s·photon^-1）. Concerning the influence of pendent group and extension of π-conjugation on 3 values, another four oligomers P2, PPV, P1-1, and P2-1 were investigated for comparison. The calculation results reveal that the position and property of pendent group have great influence on the OPA and TPA properties. A most crucial role for relatively larger 3 value was played by the extension of π-conjugation.

关键词： one-photon absorption two-photon absorption cross section second hyperpolarizability PPV sum-over-state charge transfer

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SYNTHESIS OF A SERIES OF NOVEL ORGANIC COMPOUNDS WITH two-photon absorption AND two-photon PUMPED LASING

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Chinese Chemical Letters 2001年第1期12卷 27-30页

作者： Xiao Mei WANG Qi FANG Chun WANG Guang Yong ZHOU Yan REN Min Hua JIANG State key laboratory of Crystal Materials Shandong UniversityJinan 250100

A series of novel organic compounds named as CSPI, DPASPI, PSPI DEASPI and HEASPI respectively, with large two-photon absorption has been synthesized and their structures have been determined by (HNMR)-H-1 and elemental analysis. The highest two-photon pumped (TPP) output /input efficiency is as high as 13.4% for PSPI in DMF with d(0) = 0.03 mol/L and the effective two-photon absorption cross section is 8.8x10(-48) cm(4).s/photon for DPASPI in DMF with d(0) = 0.05 mol/L.

关键词： Substituted styryl pyridinium derivatives two-photon absorption cross section two-photon up-conversion lasing

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