An emissive charge-transfer excited-state at the well-defined hetero-nanostructure interface of an organic conjugated molecule and two-dimensional inorganic nanosheet

DOI IR IR (HANDLE) HANDLE Web Site View 1 Remaining Hide 57 References Open Access

Search this article

Description

Precise engineering of excited-state interactions between an organic conjugated molecule and a two-dimensional semiconducting inorganic nanosheet, specifically the manipulation of charge-transfer excited (CTE) states, still remains a challenge for state-of-the-art photochemistry. Herein, we report a long-lived, highly emissive CTE state at structurally well-defined hetero-nanostructure interfaces of photoactive pyrene and two-dimensional MoS₂ nanosheets via an N-benzylsuccinimide bridge (Py-Bn-MoS₂). Spectroscopic measurements reveal that no charge-transfer state is formed in the ground state, but the locally-excited (LE) state of pyrene in Py-Bn-MoS₂ efficiently generates an unusual emissive CTE state. Theoretical studies elucidate the interaction of MoS₂ vacant orbitals with the pyrene LE state to form a CTE state that shows a distinct solvent dependence of the emission energy. This is the first example of organic–inorganic 2D hetero-nanostructures displaying mixed luminescence properties by an accurate design of the bridge structure, and therefore represents an important step in their applications for energy conversion and optoelectronic devices and sensors.

Journal

  • Chemical Science

    Chemical Science 14 (42), 11914-11923, 2023-11-14

    Royal Society of Chemistry (RSC)

References(57)*help

See more

Related Projects

See more

Keywords

Details 詳細情報について

Report a problem

Back to top