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可见光区具有强手性光学响应的B、N-嵌入双异质[7]螺旋烯
作者:小柯机器人 发布时间:2021/10/21 16:41:38

南开大学王小野团队开发了可见光区具有强手性光学响应的B、N-嵌入双异质[7]螺旋烯。相关研究成果于2021年10月19日发表在《美国化学会杂志》。

开发具有明显手性光学响应、覆盖广泛的可见光谱的螺旋烯分子,对于手性光电应用是非常理想的;然而,它们的吸收不对称因子(gabs)大多低于0.01。

该文中,研究人员报道了前所未有的含非键合B和N原子的B,N嵌入双异质[7]螺旋烯,其表现出优异的手性光学性质,如在300-700nm范围内具有很强的手性光学活性,在可见光谱范围内gabs高达0.033,以及从红色到近红外区域(600–800 nm)可调谐圆极化发光(CPL),具有高达100%的光致发光量子产率(PLQYs)。理论分析表明,高gabs值与非键B和N原子的掺入导致的分离分子轨道分布有关。

新型B,N嵌入双异质螺旋烯为未来高性能手性光学材料的开发开辟了一条诱人的途径。

附:英文原文

Title: B,N-Embedded Double Hetero[7]helicenes with Strong Chiroptical Responses in the Visible Light Region

Author: Ji-Kun Li, Xing-Yu Chen, Yun-Long Guo, Xin-Chang Wang, Andrew C.-H. Sue, Xiao-Yu Cao, Xiao-Ye Wang

Issue&Volume: October 19, 2021

Abstract: The development of helicene molecules with significant chiroptical responses covering a broad range of the visible spectrum is highly desirable for chiral optoelectronic applications; however, their absorption dissymmetry factors (gabs) have been mostly lower than 0.01. In this work, we report unprecedented B,N-embedded double hetero[7]helicenes with nonbonded B and N atoms, which exhibit excellent chiroptical properties, such as strong chiroptical activities from 300 to 700 nm, record high gabs up to 0.033 in the visible spectral range, and tunable circularly polarized luminescence (CPL) from red to near-infrared regions (600–800 nm) with high photoluminescence quantum yields (PLQYs) up to 100%. As revealed by theoretical analyses, the high gabs values are related to the separate molecular orbital distributions owing to the incorporation of nonbonded B and N atoms. The new type of B,N-embedded double heterohelicenes opens up an appealing avenue to the future exploitation of high-performance chiroptical materials.

DOI: 10.1021/jacs.1c09058

Source: https://pubs.acs.org/doi/10.1021/jacs.1c09058

 

期刊信息

JACS:《美国化学会志》,创刊于1879年。隶属于美国化学会,最新IF:14.612
官方网址:https://pubs.acs.org/journal/jacsat
投稿链接:https://acsparagonplus.acs.org/psweb/loginForm?code=1000