Benzosiloles with Crystallization‐Induced Emission Enhancement of Electrochemiluminescence: Synthesis, Electrochemistry, and Crystallography. Issue 51 (7th August 2020) - Yang, Liuqing
Abstract: Crystallization‐induced emission enhancement (CIEE) was demonstrated for the first time for electrochemilunimescence (ECL) with two new benzosiloles. Compared with their solution, the films of the two benzosiloles gave CIEE of 24 and 16 times. The mechanism of the CIEE‐ECL was examined by spooling ECL spectroscopy, X‐ray crystal structure analysis, photoluminescence, and DFT calculations. This CIEE‐ECL system is a complement to the well‐established aggregation‐induced emission enhancement (AIEE) systems. Unique intermolecular interactions are noted in the crystalline chromophore. The first heterogeneous ECL system is established for organic compounds with highly hydrophobic properties. Abstract : The photoluminescence and electrochemiluminescence (ECL) of two benzosiloles are significantly enhanced upon their crystallization. The developed ECL system with crystallization‐induced emission enhancement is clearly differentiated from ECL systems with aggregation‐induced emission enhancement, and it is also anticipated to find applications in ECL sensing and optoelectronics (see figure).