A series of σ-π extended octamethyltetrasilanes, which have phenothiazine, 9,9-dimethyl-9,10-dihydroacridine, or phenoxazine (, , and ) groups as donor moieties and thienopyrazine or benzothiadiazole ( and ) groups as acceptor fragments, has been prepared, and their optical properties have been studied as an extension of our work. All six compounds exhibited fluorescence in the solid state with maximum wavelengths centered in the range of 400 and 650 nm upon excitation by a UV lamp. Compound showed apparent dual emission behavior in solution, which depends on solvent polarity, and a reversible photoluminescent change under mechanical and thermal stimuli in the solid state. Quantum chemical calculations suggest the contribution of a quasi-axial conformer of the 9,9-dimethyl-9,10-dihydroacridine moiety in to the dual emission in solution and the mechanofluoroluminescence in the solid state, similarly to . These studies provide new insight into the preparation of disilane-bridged triads capable of responding to multiple stimuli.

Download full-text PDF

Source
http://dx.doi.org/10.1021/acs.joc.2c00641DOI Listing

Publication Analysis

Top Keywords

solid state
12
disilane-bridged triads
8
dual emission
8
series d-a-d
4
d-a-d structured
4
structured disilane-bridged
4
triads structure
4
structure stimuli-responsive
4
stimuli-responsive luminescence
4
luminescence studies
4

Similar Publications

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!