- 作者: Chin-Ti Chen, Tzu-Yao Jeremy Lin, Chiung-Hsueh Chen and Kuan-Jiuh Lin
- 中文摘要: Linear and nonlinear optical properties of two new nickel(diimine)(dithiolate) complexes, nickel(4,4?/font-dinitro-2,2?/font-bipyridyl)(tfd), Ni(NO2bipy)(tfd), (tfd = 1,2-trifluoromethylethene-1,2-dithiolate) and nickel(4,7-diphenyl-1,10-phenathroline)(tfd), Ni(dpphen)(tfd) are reported. Ni(NO2bipy)(tfd) has a potent electronic acceptor substituted on the diimine ligand and exhibits an enhanced molecular first hyperpolarizability (b0 = -31 ?/font 10-30 esu), which is more than three times greater than that (b0 = -10 ?/font 10-30 esu) of Ni(dpphen)(tfd). Ni(NO2bipy)(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(NO2bipy)(tfd) is used to compared the p-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(CO2Bubipy)(tfd).
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