Programmable singlet-triplet exciton regulated molecular platform as well as preparation method and application thereof

Abstract

The invention discloses a programmable singlet-triplet exciton regulated molecular platform as well as a preparation method and application thereof, and belongs to the technical field of organic photoelectric materials. The molecular platform comprises a D-sigma-A ligand formed by connecting a carbazole donor unit with a terpyridine receptor unit through a flexible alkyl spacer chain, and a zinc salt complex coordinated with the ligand. By cooperatively regulating and controlling the alkyl spacer chain length and the zinc salt counter ion type, the full-range and continuous accurate modulation of the solution phase singlet state and triplet state exciton population ratio from nearly 0% to about 100% can be realized in a single molecule platform. A series of dissolved oxygen probes can be constructed based on the platform: when an alkyl chain is relatively short, a turn-off probe based on luminous intensity change is formed; when the alkyl chain is long, a self-calibration ratio-type probe based on a characteristic peak intensity ratio is formed. The invention provides a brand new programmable material tool for excited state dynamics research and high-precision optical sensing.

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