摘要
It has been a mystery that the detected fluorescence intensity of single MEH-PPV molecules is much lower than expected based on their chain length.In this review,after re-evaluating of the literature data in the light of new specially designed experiments,we present a comprehensive explanation of this issue:The actual size of MEH-PPV molecules at single molecule level is much smaller than expected due to de-aggregation and chain scission,while static quenching("dark matter")also exists for large molecules,further reducing their brightness.
基金
supported by the National Natural Science Foun-dation of China(NSFC Nos.22073046 and 62011530133)
the Fundamental Research Funds for the Central Universities(020514380256 and 020514380278)
the State Key Laboratory of Analytical Chemistry for Life Science(SKLACL2217)
The authors are also grateful to the STINT China-Sweden mobility program CH2019-8329 and the Swedish Research Council(2020-03530).
