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Second-order Nonlinear Optical Properties of a Series of benzothiazole derivatives

Chinese Journal of Chemistry 2003年第1期21卷 9-15页

作者：刘孝娟冷卫南封继康任爱民周新 State Key Laboratory of Theoretical Computational Chemistry Institute of Theoretical Chemistry Jilin University Department of Chemistry and Chemical Engineering Southeast University

The second-order nonlinear optical (NLO) properties of a series of benzothiazole derivatives were studied by use of the ZINDO-SOS method. These chromophores are formed by a donor-π-bridge-acceptor system, based on a nitro group connected with benzothiazole as the acceptor and a hydroxyl-functional amino group as the donor. For the purpose of comparison, we also designed molecules in which nitrobenzene is an acceptor. The calculation results indicate that benzothiazole derivatives exhibit larger second-order polarizabilities than nitrobenzene derivatives. In order to clarify the origin of the NLO response of these chromophores, their electron properties were investigated as well. The benzothiazole derivatives are good candidates for application in electro-optical device due to their high optical nonlinearities, good thermal and photonic stability.

关键词： second-order nonlinear polarizability benzothiazole derivatives ZINDO-SOS

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Single & Two-photon Excited Fluorescence of Two New Compounds with 2-Benzothiazolyl as Electron Acceptor

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Chinese Chemical Letters 2003年第5期14卷 547-550页

作者： Du Xia CAO Qi FANG Dong WANG Zhi Qiang LIU State Key Laboratory of Crystal Materials Shandong UniversityJi’nan 250100

Two new D--A type compounds, where electron-donor D is tertiary amino group, electron-acceptor A is 2-benzothiazolyl and ?is two conjugated styryl units, have been synthesized. They are named as trans, trans-2-{4-[4-(N, N-diethylamino)styryl]styryl}-1, 3-benzothiazole and trans, trans-2-{4-[4-(N, N-diphenylamino)styryl]styryl}-1, 3-benzothiazole. Both compounds show strong two-photon excited fluorescence in yellow-orange region when excited by a femtosecond laser at 800 nm.

关键词： benzothiazole derivatives two-photon excited fluorescence nonlinear optical compounds.

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Synthesis of Two Novel Additives and Study of Their Tribological Properties in Rapeseed Oil

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China Petroleum Processing & Petrochemical Technology 2007年第3期9卷 29-33页

作者： Zhou Maolin Li Fenfang Zeng Xiaojun Fan Chengkai School of Chemistry and Chemical Engineering Central South University Changsha 410083 China

Two novel ashless additives - benzothiazole derivatives containing boron and chlorine, OBC and BBC, were synthesized. The tribological performances of OBC and BBC at different mass ratios as additives in rapeseed oil （RO） were examined on a four-ball machine. The worn surfaces of the lower steel balls lubricated by oil samples were analyzed by means of scanning electron microscopy （SEM）. The test results showed that OBC and BBC had good solubility in the base oil, and could effectively increase the load-carrying capacity of the base oil. The maximum non-seizure load of oil sample containing 1.5 m% BBC was 1117 N, which was 2.3 times as much as that of the base oil. Both OBC and BBC could improve the anti-wear and corrosion inhibiting performance and thermal stability of the base oil, whose initial decomposition temperatures was above 350 ~C. However, OBC and BBC at different concentrations could increase the friction coefficient of the base oil. The SEM morphology of steel balls lubricated by oil samples containing 1.5 m% additives seemed to be more uniform and smoother than that of the base oil, and the scars formed were very shallow.

关键词： additives anti-wear friction reduction rapeseed oil benzothiazole derivatives

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Three water-soluble two-photon nuclear envelope developer based on fluorescent organic nanoparticles with embedded structure

Three water-soluble two-photon nuclear envelope developer ba...

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中国化学会第十四届全国有机合成化学学术研讨会

作者： Xiaoping Gan Hongping Zhou School of Science Anhui Agricultural University College of Chemistry and Chemical Engineering Anhui University

In recent years, two-photon fluorescence bio-imaging has attracted intensive attention in optical diagnosis and treatment as a consequence of less photo bleaching, higher spatial resolution and deeper light penetration1-3. In order to obtain bio-imaging materials owned large 2PA cross-sections and good biocompatibility, we introduced benzothiazole as an electron-withdrawing group and fluorophore into triphenylamine core and constructed a series of branched triphenlyamine benzothiazole derivatives（B1-3）. Then we systematically researched their structure-property relationship, especially the two-photon excited florescence emission abilities and fluorescence quantum yields accompanied with the change of branch number. The results illustrated the largest fluorescence quantum yield and effective 2PA cross-section reached to 0.81 for compound B1 and 1013 GM for compound B3 in tetrahydrofuran solutions, respectively. Furthermore, the water-soluble fluorescent organic nanoparticles（FONs） owned embedded structure had been prepared by the three compounds and Pluronic F127, which were successfully applied on two-photon nuclear envelope imaging.

关键词： benzothiazole derivatives water-soluble two-photon imaging FONs

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