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Arsenic‐Bridged Silafluorene and Germafluorene as a Novel Class of Mixed‐Heteroatom‐Bridged Heterofluorenes
Author(s) -
Sasaki Hiroshi,
Akioka Ippei,
Imoto Hiroaki,
Naka Kensuke
Publication year - 2021
Publication title -
european journal of organic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.825
H-Index - 155
eISSN - 1099-0690
pISSN - 1434-193X
DOI - 10.1002/ejoc.202001644
Subject(s) - heteroatom , chemistry , arsenic , intersystem crossing , bridging (networking) , singlet state , photochemistry , phosphorescence , biphenyl , luminescence , crystallography , organic chemistry , excited state , fluorescence , ring (chemistry) , computer network , physics , optoelectronics , quantum mechanics , computer science , nuclear physics
Arsenic‐bridged silafluorene and germafluorene were synthesized as a novel class of mixed‐heteroatom‐bridged heterofluorenes. Their structures, photophysical properties, and electronic natures were studied by experimental and computational means. The doubly‐bridged biphenyl moieties were distorted from the reported singly‐bridged ones. The intersystem crossing from the singlet excitation states to the triplet ones was enhanced by the arsenic‐bridging structures, implying that bridging through an arsenic atom is favorable for phosphorescence.