Triarylborane-Appended New Triad and Tetrad: Chromogenic and Fluorogenic Anion Recognition
作者:Chinna Ayya Swamy P、Pakkirisamy Thilagar
DOI:10.1021/ic402898n
日期:2014.3.17
of the new triad and tetrad are highly dependent on individual building units. The nature of electronic communication among the individual fluorophore units has been comprehensively investigated and compared with building units. Compounds 3 and 4 showed chromogenic and fluorogenic responses for small anions such as fluoride and cyanide.
Two photon absorption energy transfer in the light-harvesting complex of photosystem II (LHC-II) modified with organic boron dye
作者:Li Chen、Cheng Liu、Rui Hu、Jiao Feng、Shuangqing Wang、Shayu Li、Chunhong Yang、Guoqiang Yang
DOI:10.1016/j.saa.2014.02.166
日期:2014.7
The plant light-harvesting complexes of photosystem II (LHC-II) play important roles in collecting solar energy and transferring the energy to the reaction centers of photosystems I and II. A two photon absorption compound, 4-(bromomethyl)-N-(4-(dimesitylboryl)phenyl)-N-phenylaniline (DMDP-CH2Br), was synthesized and covalently linked to the LHC-II in formation of a LHC-II-dye complex, which still maintained the biological activity of LHC-II system. Under irradiation with femtosecond laser pulses at 754 nm, the LHC-II-dye complex can absorb two photons of the laser light effectively compared with the wild type LHC-II. The absorbed excitation energy is then transferred to chlorophyll a with an obvious fluorescence enhancement. The results may be interesting and give potentials for developing hybrid photosystems. (C) 2014 Elsevier B.V. All rights reserved.