Mechanical Grinding-Induced Intermolecular Charge Transfer for Near-Infrared Photothermal Conversion.

Inorg Chem

College of Materials and Chemical Engineering, Pingxiang University, Pingxiang, Jiangxi 337055, (PR China).

Published: September 2024

AI Article Synopsis

  • * A unique coloration change occurs during grinding, which helps in identifying different organic molecules due to the characteristics of charge transfer.
  • * The compounds' porous structure allows for the absorption of guest molecules and maintains charge transfer stability, paving the way for applications in detecting organic substances and potentially enhancing near-infrared photothermal conversion.

Article Abstract

In this study, charge-transfer-type compounds comprising synthesized naphthalenediimide derivative () or its Pb-based coordination polymer () and suitable primary or secondary amine organic molecules were prepared by the solvent-free mechanical grinding method. The coloration phenomenon arising from charge transfer during grinding serves as a discriminative tool for distinguishing various organic guest molecules. The porous structure of crystals facilitates the infiltration of guest molecules and contributes to the preservation of the intermolecular charge transfer state. Moreover, the intermolecular charge transfer induced by grinding exhibits remarkable stability in an ambient atmosphere, underscoring the pivotal role of well-ordered molecules in the mechanical grinding procedure. This mechanochromic phenomenon holds promise for the detection and sensing of organic molecules, while the exceptional charge-transfer absorption characteristics offer the potential for efficient near-infrared photothermal conversion.

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Source
http://dx.doi.org/10.1021/acs.inorgchem.4c02467DOI Listing

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