Arsenic‐Bridged Silafluorene and Germafluorene as a Novel Class of Mixed‐Heteroatom‐Bridged Heterofluorenes

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 f...

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Bibliographic Details
Published inEuropean journal of organic chemistry Vol. 2021; no. 9; pp. 1390 - 1395
Main Authors Sasaki, Hiroshi, Akioka, Ippei, Imoto, Hiroaki, Naka, Kensuke
Format Journal Article
LanguageEnglish
Published WEINHEIM Wiley 05.03.2021
Wiley Subscription Services, Inc
Subjects
Arsenic
Chemistry
Chemistry, Organic
Germanium
Heterofluorene
Phosphorescence
Physical Sciences
Science & Technology
Silicon
FACILE SYNTHESIS
Arsenic
GERMOLES
RHODIUM-CATALYZED SYNTHESIS
Heterofluorene
Germanium
Phosphorescence
Silicon
DERIVATIVES
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Summary: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. Arsenic‐bridged silafluorene and germafluorene were synthesized as a new class of mixed‐heteroatom‐bridged heterofluorenes. The arsenic atom promoted intersystem crossing due to the heavy‐atom effect to enhance phosphorescence.
Bibliography:KAKEN
ISSN:1434-193X
1099-0690
DOI:10.1002/ejoc.202001644