Catalyst- and Template-Free Ultrafast Visible-Light-Triggered Dimerization of Vinylpyridine-Functionalized Tetraarylaminoborane: Intriguing Deep-Blue Delayed Fluorescence

Kalluvettukuzhy K. Neena, Pagidi Sudhakar, Pakkirisamy Thilagar

Research output: Contribution to journalArticlepeer-review

26 Scopus citations

Abstract

A photoredox-catalyst- and template-free sunlight-induced molecular dimerization of a vinylpyridine-functionalized tetraarylaminoborane (TAAB) has been accomplished for the first time. The reaction is quantitative, highly regioselective, and thermally irreversible. The presence of the propeller-shaped TAAB framework allows selective photodimerization of one of the two vinyl pyridine units. Monomer 1 and photodimer 2 exhibit distinct photophysical properties with delayed fluorescence (DF) both in solution and the solid state, which was confirmed by steady-state and time-resolved luminescence studies. Quantum mechanical calculations were performed to support the experimental observations. Our new approach using [2+2] cycloaddition chemistry paves the way for the development of highly sought-after deep-blue DF materials.

Original languageEnglish
Pages (from-to)16806-16810
Number of pages5
JournalAngewandte Chemie - International Edition
Volume57
Issue number51
DOIs
StatePublished - 17 Dec 2018
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2018 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim

Funding

Authors thank the science and engineering research board (SERB), India and Indian Institute of Science, Bangalore for financial support.

FundersFunder number
Indian Institute of Science
Science and Engineering Research Board

    Keywords

    • aminoboranes
    • boron
    • delayed fluorescence
    • photodimerization

    Fingerprint

    Dive into the research topics of 'Catalyst- and Template-Free Ultrafast Visible-Light-Triggered Dimerization of Vinylpyridine-Functionalized Tetraarylaminoborane: Intriguing Deep-Blue Delayed Fluorescence'. Together they form a unique fingerprint.

    Cite this