期刊
JOURNAL OF MOLECULAR MODELING
卷 17, 期 5, 页码 1041-1049出版社
SPRINGER
DOI: 10.1007/s00894-010-0805-6
关键词
C-36; Chromophore; First hyperpolarizability; Fullerene derivative; Non-linear optics
类别
资金
- National Science Foundation of China [20706029, 20876073]
- Jiangsu Science and Technology Department of China [BK2008372]
- Nanjing University of Technology of China [ZK200803]
We investigate theoretically the structures and second-order nonlinear optical (NLO) responses (first hyperpolarizabilities) of 15 trisaza-bridged (36) fulleroids (series-A) and 15 triborane-bridged (36) fulleroids (series-B). 3A has smaller transition energy and smaller ground state dipole moment, resulting in relatively larger static first hyperpolarizability (10647 au). Most trisaza-bridged (36) fulleroids have larger beta values than the corresponding triborane-bridged (36) fulleroids. The f(0) and Delta mu remain stable values when substituents R change for series-A except 2A and 5A (for series-B except 5B and 10B) and beta values are proportional to Delta E-3, which implies that the beta values for series-A and series-B follow the two-level model. Results demonstrate that a proper bridge and lower transition energy Delta E are more favorable to enlarging first hyperpolarizabilities of series-A and series-B. In addition, the frequency-dependent SHG and EOPE are also estimated and discussed. The current work can stimulate experimentalists to synthesize novel NLO materials designed in this work.
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