摘要
非线性光学(NLO)晶体材料作为激光科学的重要组成部分,因其在信息存储等领域的广泛应用而越来越受到研究人员的关注.从阴离子基团理论可知,具有π共轭电子结构的平面六元环(B_(3)O_(6))基团是“中国牌”晶体β-Ba_(2)B_(2)O_(4)(BBO)具有优异光学性能的决定性化学组分.因此,利用具有共轭大π键的平面基团进行紫外NLO晶体的分子构筑,已成为探索新型具有良好NLO性能材料的一种非常有效的方式.近年来,为了拓宽紫外NLO晶体的研究范围,具有与(B_(3)O_(6))基团相似构型的一系列有机平面π共轭基团逐渐引起了研究人员的兴趣.目前,研究人员已经发现了许多具有优异光学性能的含类B_(3)O_(6)型有机平面π共轭基团的紫外NLO晶体,这些B_(3)O_(6)型有机共轭基团可以根据构成六元环的原子分为不同的类别:(HxC_(3)N_(3)O_(3))^(x-3)(x=0~3)(氰尿酸离子)、(HxC_(4)N_(2)O_(3))^(x-4)(x=2,3)(巴比妥酸离子)、(C_(3)H_(7)N_(6))^(+)(三聚氰胺离子)、(C_(5)H_(6)ON)+(4-羟基吡啶阳离子)和(C_(4)H_(6)N_(3))+(2-氨基嘧啶阳离子).重点介绍含类B_(3)O_(6)型有机平面π共轭基团的紫外NLO晶体的研究进展,并总结它们的晶体结构、合成方法、光学性能以及结构和性质之间的关系,为了解类B_(3)O_(6)型有机平面π共轭基团及其光学功能性质提供一个清晰的视角,并促进新型紫外NLO晶体的研究.
Nonlinear optical(NLO)materials as a crucial part of laser science have attracted increasing attentions because of their wide applications in information storages,et al.Based on the anionic group theory,the planar 6-membered ring(B_(3)O_(6))group withπ-conjugated electronic structure is the decisive chemical component of“China brand”crystalβ-Ba_(2)B_(2)O_(4)(β-BBO)with excellent optical properties.Therefore,it is an effective way to explore new materials with good NLO properties by using planarπ-conjugated groups.In recent years,the organic coplanarπ-conjugated B_(3)O_(6)-typed structures have caught researchers'attentions due to their similar configurations to the(B_(3)O_(6))groups,which are the potential sources for exploring the(B_(3)O_(6))groups with outstanding optical properties.Up to now,researchers have obtained many ultraviolet(UV)NLO crystals with excellent properties withπ-conjugated B_(3)O_(6)-typed groups.Herein,these B_(3)O_(6)-typed groups could be divided into different categories according to the atoms constituting 6-MRs:(HxC_(3)N_(3)O_(3))^(x-3)(x=0-3)(Cyanurate ion),(HxC_(4)N_(2)O_(3))^(x-4)(x=2,3)(Barbiturate ion),(C_(3)H_(7)N_(6))^(+)(Melamine ion),(C_(5)H_(6)ON)+(4-hydroxypyridine cation),and(C_(4)H_(6)N_(3))+(2-aminopyrimidinium cation).In this review,we introduced the research advances of NLO materials withπ-conjugated B_(3)O_(6)-typed groups,and summarized the crystal structures,synthetic methods,optical performances,as well as the relationships between structures and properties.This work provided a clear perspective for understanding the coplanarπ-conjugated B_(3)O_(6)-typed groups with their optical functional properties and promote the searches to develop potential NLO functional crystals.
作者
罗敏
LUO Min(Fujian Institute of Research on the Structure of Matter,Chinese Academy of Sciences,Fuzhou 350108,Fujian)
出处
《四川师范大学学报（自然科学版）》
CAS
2024年第1期1-16,F0002,共17页
Journal of Sichuan Normal University（Natural Science）
基金
国家自然科学基金优秀青年基金(22222510)。
