New zinc() dyes with enhanced two-photon absorption cross sections based on the imidazolyl ligand

A series of new zinc( ii ) complexes ( Dyes 13 ) were obtained by self-assembly of the donor-bridge-donor (DD) type ligand L with ZnX 2 (X = Br, I, SCN). The single crystal of Dye 3 was obtained by slow evaporation of a mixture solution of methanol and dichloromethane. The molecular structure has be...

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Bibliographic Details
Published in:RSC advances 2016-01, Vol.6 (81), p.77849-77853
Main Authors: Liu, Dan, Zhang, Na, Zhang, Xinyu, Kong, Shuai, Yu, Jianhua, Wu, Zhichao, Wu, Jieying, Tian, Yupeng, Zhou, Hongping
Format: Article
Language:English
Subjects:
Absorption cross sections
Coordination compounds
Dyes
Ligands
Methyl alcohol
Molecular structure
Self assembly
Vulnerability
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Summary:A series of new zinc( ii ) complexes ( Dyes 13 ) were obtained by self-assembly of the donor-bridge-donor (DD) type ligand L with ZnX 2 (X = Br, I, SCN). The single crystal of Dye 3 was obtained by slow evaporation of a mixture solution of methanol and dichloromethane. The molecular structure has been determined by X-ray crystallography. Hydrogen bonds (CHN, CHS) play significant roles in the final topological structures. Linear and nonlinear optical properties of the ligand and complexes were investigated in details. Experimental results revealed that effective two-photon absorption (TPA) cross sections of these complexes are larger than that of ligand L (18.7 GM) with the maximum values of 88.7 GM ( Dye 1 ), 41.9 GM ( Dye 2 ) and 46.5 GM ( Dye 3 ) in DMF, respectively. The biological imaging result shows that L and Dyes 13 had excellent penetrability in living cells. The effective TPA cross sections of Dyes 13 revealed that the exceeding TPA behavior may attributed to form the new DA type compound that enhanced the intramolecular ICT progress. Dyes 13 were successfully applied in bio-imaging.
ISSN:2046-2069
2046-2069
DOI:10.1039/c6ra16817e