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Excited‐State Charge Transfer in Covalently Functionalized MoS 2 with a Zinc Phthalocyanine Donor–Acceptor Hybrid
Author(s) -
CantonVitoria Ruben,
Gobeze Habtom B.,
BlasFerrando Vicente M.,
Ortiz Javier,
Jang Youngwoo,
FernándezLázaro Fernando,
SastreSantos Ángela,
Nakanishi Yusuke,
Shinohara Hisanori,
D'Souza Francis,
Tagmatarchis Nikos
Publication year - 2019
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201900101
Subject(s) - excited state , materials science , exciton , femtosecond , ultrafast laser spectroscopy , photochemistry , phthalocyanine , acceptor , zinc , fluorescence , surface modification , optoelectronics , nanotechnology , chemistry , atomic physics , laser , optics , physics , quantum mechanics , condensed matter physics , metallurgy
The functionalization of MoS 2 is of paramount importance for tailoring its properties towards optoelectronic applications and unlocking its full potential. Zinc phthalocyanine (ZnPc) carrying an 1,2‐dithiolane oxide linker was used to functionalize MoS 2 at defect sites located at the edges. The structure of ZnPc‐MoS 2 was fully assessed by complementary spectroscopic, thermal, and microscopy imaging techniques. An energy‐level diagram visualizing different photochemical events in ZnPc‐MoS 2 was established and revealed a bidirectional electron transfer leading to a charge separated state ZnPc . + ‐MoS 2 .− . Markedly, evidence of the charge transfer in the hybrid material was demonstrated using fluorescence spectroelectrochemistry. Systematic studies performed by femtosecond transient absorption revealed the involvement of excitons generated in MoS 2 in promoting the charge transfer, while the transfer was also possible when ZnPc was excited, signifying their potential in light‐energy‐harvesting devices.