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J Phys Chem A. 2010 Nov 11;114(44):11879-89. doi: 10.1021/jp105710n.

Effect of chemical substituents on the energetical landscape of a molecular photoswitch: an ab initio study.

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Institute of Physics, Polish Academy of Sciences, 02-668 Warsaw, Poland.


The effect of chemical substitutions on the energetical landscape of an optical molecular switch (Phys. Chem. Chem. Phys. 2008, 10, 1243) was studied with the aid of ab initio electronic structure methods. Series of different chemical moieties were substituted into the molecular frame of 7-hydroxyquinoline as well as into the "molecular crane" at position 8 of the frame. It was shown that the π-electron-donating/withdrawing properties of substituents substantially modify the energetical landscape of the system in the ground as well as in the lowest excited ππ* and nπ* singlet states.


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