期刊
ACS APPLIED MATERIALS & INTERFACES
卷 10, 期 20, 页码 17409-17418出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.8b00165
关键词
aggregation-induced emission; air-water interface; spherical Aggregate; mechanoluminescence; light-emitting diodes
资金
- SERB, DST, India [EMR/2014/000664]
- CSIR India [02(0150)/13/EMR-II]
- DST-INSPIRE
- DST FIST
- Central DST FIST program
Luminescent materials possessing both the mechanoluminescence (MCL) and electroluminescence (EL) properties are the quest for sensing and optoelectronic applications. We report on the synthesis of a new tailor-made luminogen, 1,2-Wbis (4-(1-( [1,1'-biphenyl]-4-y1)-2,2-diphenylvinyl)phenyI)-1,2-diphenylethene (TPE 5), using Suzuki coupling reaction with high yield. An aggregation induced emission (ALE) active complex TPE 5 forms supramolecular spherical aggregates at the air-water interface of a Langmuir trough. As a consequence, a large enhancement of luminescence is obtained from the mono- and multilayer Langmuir-Blodgett films of TPE 5 owing to the ALE effect. The luminogen TPE 5 exhibits a reversible MCL response, displaying photoluminescence switching due to change in the crystalline states under external stimuli. The unique feature of luminescence enhancement upon aggregate formation is utilized for the fabrication of light-emitting diodes with low threshold voltage using supramolecular aggregates as the active layer. This work demonstrates an efficient strategy for obtaining controlled supramolecular aggregates of AlEgen with a potential in the dual applications of MCL and EL.
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