Photophysical Engineering of Transition Metal pi-Diborene and -Diboryne Complexes

在过去的几年里，硼元素和硼-硼多键的构建一直是Braunschweig小组的主要研究重点，最终得到了B-N和B-O三键和B-C双键的分离，其中包括铂的亚胺基硼、氧硼和亚烷基硼的配合物，以及合成了二硼烯和二硼炔，即烯烃和炔烃的全硼类似物。在这项工作的过程中，我们能够配位二龙脑和二龙脑来创造金属中心，并发现得到的络合物是高度发光的。而二硼烯的铜(I)和银(I)配合物表现出异常高的量子产率(0.18-0.95)和寿命为几纳秒的荧光，而与之配位的三个CuCL的二硼烯在微秒时间尺度上显示出强烈的发射，表明其发光本质上是磷光的。这项拟议的工作代表了我们具有这种实验室好奇心的团队首次进军材料科学领域，探索这些根本上新的化合物类别，以便进一步开发它们，并使它们可用于开发光活性材料的应用。

The construction of boron-element and boron-boron multiple bonds has been a major research focus of the Braunschweig group in the last few years, culminating in the isolation of B-N and B-O triple bond and B-C double bond containing iminoboryl, oxoboryl and alkylideneboryl complexes of platinum, as well as in the synthesis of diborenes and diborynes, the all-boron analogues of alkenes and alkynes. In the course of this work we were able to coordinate diborenes and diborynes to coinage metal centers and found the resulting complexes to be highly luminescent. Whereas copper(I) and silver(I) complexes of diborenes exhibit fluorescence in unusually high quantum yields of 0.18-0.95 with lifetimes of a few nanoseconds, a diboryne with three CuCl coordinated to it shows intense emission on the microsecond timescale, indicating the luminescence to be phosphorescence in nature.This project aims at the investigation and understanding of the photophysical properties of diborene and diboryne transition metal complexes. The proposed work represents the first foray of our groups with such lab curiosities into the field of materials science, exploring these fundamentally new classes of compounds in order to develop them further and make them available for applications which exploit photoactive materials.