title: Hydrogen-bond-directed-linking solving transparence-efficiency tradeoff in nonlinear optical molecule.
abstract: It is well known that settling transparency-efficiency tradeoff is important to design nonlinear optical (NLO) materials. In this work, we constructed one-dimensional polymeric cyanoacetylene (NCCCH)n by hydrogen-bond-directed-linking to understand this tradeoff from molecular level. Results show that the first hyperpolarizability of (NCCCH)n (n=2-8) gradually increased with the increase of n, and what is more important is that the red-shifts, associated with the increase of n, were very little. It is proposed that these polymeric structures possess double-degenerated charge transitions, which contribute to the hyperpolarizability in an additive fashion, and that the coupled oscillators are gradually improved, which lead to the increase of the first hyperpolarizability. Therefore, we propose the hydrogen-bond-directed-linking idea is helpful to develop the potential high-performance NLO materials.
authors.affiliation: School of Chemistry and Materials Science, Huaibei Normal University, Huaibei 235000, China. Electronic address: mafangchem@foxmail.com.
authors.forename: Fang
authors.initials: F
authors.lastname: Ma
authors.affiliation: School of Chemistry and Materials Science, Huaibei Normal University, Huaibei 235000, China.
authors.forename: Dong-Sheng
authors.initials: DS
authors.lastname: Bai
authors.affiliation: Institute of Functional Material Chemistry, Faculty of Chemistry, Northeast Normal University, Changchun 130024, China. Electronic address: hlxu@nenu.edu.cn.
authors.forename: Hong-Liang
authors.initials: HL
authors.lastname: Xu
mesh_terms: D000114:Acetylene / Q000031:analogs & derivatives* / Q000737:chemistry; D006860:Hydrogen Bonding; D007536:Isomerism; D008958:Models, Molecular; D008968:Molecular Conformation; D009570:Nitriles / Q000737:chemistry*; D011789:Quantum Theory; D013816:Thermodynamics
chemical_list: D009570:Nitriles; C513097:cyanoacetylene; D000114:Acetylene
keywords: Charge transitions; First hyperpolarizability; Hydrogen-bond; Nonlinear optical; Transparency-efficiency