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Dual-Emissive Waterborne Polyurethanes Prepared from Naphthalimide Derivative.

ABSTRACT: Fluorescent and room-temperature phosphorescent (RTP) materials are widely used in bioimaging, chemical sensing, optoelectronics and encryption. Here, a series of single-component dual-emissive waterborne polyurethanes (WPUs) with both fluorescence and room-temperature phosphorescence were synthesized. Dye without halogen atom incorporated into WPUs can only exhibit fluorescence due to poor spin-orbit coupling. When bromine atom is introduced into dye, we found that WPUs can emit both fluorescence and room-temperature phosphorescence with lifetimes up to milliseconds because of enhanced spin-orbit coupling. Moreover, with an increase in dye concentrations in WPUs, excimers are formed due to the aggregation effect, and may promote communication between singlet and triplet states. At different dye concentrations, structural, thermal, and luminescent properties serve as the main focus.

SUBMITTER: Wang T

PROVIDER: S-EPMC6418983 | biostudies-literature | 2017 Sep

REPOSITORIES: biostudies-literature

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Dual-Emissive Waterborne Polyurethanes Prepared from Naphthalimide Derivative.

Wang Tao T Zhang Xingyuan X Deng Yipeng Y Sun Wei W Wang Qidong Q Xu Fei F Huang Xiaowen X

Polymers 20170903 9

Fluorescent and room-temperature phosphorescent (RTP) materials are widely used in bioimaging, chemical sensing, optoelectronics and encryption. Here, a series of single-component dual-emissive waterborne polyurethanes (WPUs) with both fluorescence and room-temperature phosphorescence were synthesized. Dye without halogen atom incorporated into WPUs can only exhibit fluorescence due to poor spin-orbit coupling. When bromine atom is introduced into dye, we found that WPUs can emit both fluorescen ...[more]

PMID: 30965715

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