Volume 142, Issue 32 e57282
RESEARCH ARTICLE

A Blue Tunable Waterborne Polyurethane-Based Carbon Nitride With Wide Excitation-Wavelength-Dependent Fluorescence

Zhuqing Li

Zhuqing Li

Anhui Key Laboratory of Advanced Building Materials, School of Materials Science and Chemical Engineering, Anhui Jianzhu University, Hefei, P. R. China

Contribution: Conceptualization (lead), Data curation (lead), Writing - original draft (lead)

Search for more papers by this author
Shicong Pei

Shicong Pei

Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei, P. R. China

Contribution: Software (equal), Supervision (lead)

Search for more papers by this author
Kaixuan Shao

Kaixuan Shao

Anhui Key Laboratory of Advanced Building Materials, School of Materials Science and Chemical Engineering, Anhui Jianzhu University, Hefei, P. R. China

Contribution: Formal analysis (lead), ​Investigation (lead)

Search for more papers by this author
Xiaojun She

Xiaojun She

Anhui Key Laboratory of Advanced Building Materials, School of Materials Science and Chemical Engineering, Anhui Jianzhu University, Hefei, P. R. China

Contribution: ​Investigation (equal), Methodology (lead)

Search for more papers by this author
Mingdi Yang

Corresponding Author

Mingdi Yang

Anhui Key Laboratory of Advanced Building Materials, School of Materials Science and Chemical Engineering, Anhui Jianzhu University, Hefei, P. R. China

Correspondence:

Xianhai Hu ([email protected])

Mingdi Yang ([email protected])

Contribution: Visualization (lead)

Search for more papers by this author
Kehua Zhang

Kehua Zhang

Anhui Key Laboratory of Advanced Building Materials, School of Materials Science and Chemical Engineering, Anhui Jianzhu University, Hefei, P. R. China

Contribution: Project administration (equal), Validation (equal)

Search for more papers by this author
Hang Li

Hang Li

Shandong TianLuan new Material & Technology Co., Ltd, Jining, P. R. China

Contribution: Resources (lead)

Search for more papers by this author
Yunsheng Ding

Yunsheng Ding

Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei, P. R. China

Contribution: Resources (equal), Supervision (equal)

Search for more papers by this author
Xianhai Hu

Corresponding Author

Xianhai Hu

Anhui Key Laboratory of Advanced Building Materials, School of Materials Science and Chemical Engineering, Anhui Jianzhu University, Hefei, P. R. China

Correspondence:

Xianhai Hu ([email protected])

Mingdi Yang ([email protected])

Contribution: Project administration (lead), Resources (lead), Supervision (lead), Writing - review & editing (lead)

Search for more papers by this author
First published: 30 April 2025

Funding: This work was supported by Anhui Provincial Key Research and Development Plan (2021e03020008, 2022a05020046, S202204s030200), Engineering Project of Major Scientific, Technological Achievements (202103c08020001).

ABSTRACT

Excitation wavelength-dependent fluorescent materials are a class of materials whose fluorescence emission spectra drift significantly with excitation wavelength. Herein, carbon nitrides (CNNPs) emitting blue fluorescence were synthesized by a one-pot method using urea as a conjugated monomer and L-phenylalanine as a co-precursor. Waterborne polyurethane-based carbon nitride (CNNPs-WPU) with excitation wavelength-dependent fluorescence properties was produced by accessing amino(-NH2)-rich CNNPs to waterborne polyurethane (WPU) using a modified acetone method. The results show that CNNPs-WPU has good storage and thermal stability. The fluorescence quantum yield (15.8%➔17.6%) and fluorescence lifetime (5.441 ns➔8.305 ns) of CNNPs-WPU were higher than those of CNNPs. It is worth mentioning that between 310 and 390 nm, with the rising excitation wavelength, the emission wavelength of CNNPs-WPU redshifts from 411 to 443 nm, CNNPs-WPU exhibits obvious excitation wavelength-dependent fluorescence characteristics, and the emission intensity increases with the increase of excitation wavelength, which makes it potentially applicable in the fields of anticounterfeiting, bioimaging, and light-emitting devices, etc. Moreover, the CNNPs-WPU uses water as the dispersed phase, which is green and environmentally friendly; it has a broad application prospect.

Conflicts of Interest

The authors declare no conflicts of interest.

Data Availability Statement

The data that support the findings of this study are available from the corresponding author upon reasonable request.

The full text of this article hosted at iucr.org is unavailable due to technical difficulties.