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Molecular Nonlinear Optical Properties of Acceptors Substituted 2,2′‐Bipyridine and 1,10‐Phenathroline Complexes of Nickel Dithiolate
Author(s) -
Chen ChinTi,
Lin TzuYao Jeremy,
Chen ChiungHsueh,
Lin KuanJiuh
Publication year - 2000
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.200000023
Subject(s) - diimine , nickel , chemistry , hyperpolarizability , solvatochromism , crystallography , excited state , acceptor , ligand (biochemistry) , crystal structure , photochemistry , molecule , atomic physics , polarizability , catalysis , organic chemistry , biochemistry , physics , receptor , condensed matter physics
Linear and nonlinear optical properties of two new nickel(diimine)(dithiolate) complexes, nickel(4,4′‐dinitro2,2′‐bipyridyl)(tfd), Ni(NO 2 bipy)(tfd) , (tfd = 1,2‐trifluoromethylethene‐1,2‐dithiolate) and nickel(4,7‐diphenyl‐1,10‐phenathroline)(tfd), Ni(dpphen)(tfd) are reported. Ni(NO 2 bipy)(tfd) has a potent electronic acceptor substituted on the diimine ligand and exhibits an enhanced molecular first hyperpolarizability (β 0 = −31 × 10 −30 esu), which is more than three times greater than that (β 0 = −10 × 10 −30 esu) of Ni(dpphen)(tfd). Ni(NO 2 bipy)(tfd) also possesses the longest absorption wavelength, the largest solvatochromic shift, and one of the largest dipole moment changes (‐16 debye from ground to excited state) among nickel(diimine)(dithiolate) complexes. Crystal X‐ray structure of Ni(NO 2 bipy)(tfd) is used to compared the π‐bonding structure of central (N=C‐C=N)Ni(S‐C=C‐S) unit with that of previously known nickel(4,4′‐bis(butyloxycarbonyl)‐2,2′‐bipyridyl)(tfd), Ni(CO 2 Bubipy)(tfd).