Thiadiazoloquinoxaline-based Donor-Acceptor Type Copolymers towards Ultrabroadband Optical Limiting

Jiang Wang; Pei-Ran Wang; Xiao-Wei Cheng; Shu-Yun Zhou; Shuai Han; Shi-Zhuo Xiao; Ji-Bin Sun; Cheng-Hua Sun

doi:10.1007/s10118-026-3560-6

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Thiadiazoloquinoxaline-based Donor-Acceptor Type Copolymers towards Ultrabroadband Optical Limiting

RESEARCH ARTICLE | Updated：2026-03-26

- Thiadiazoloquinoxaline-based Donor-Acceptor Type Copolymers towards Ultrabroadband Optical Limiting
- Chinese Journal of Polymer Science Vol. 44, Issue 4, Pages: 1017-1026(2026)
- Affiliations：
  
  a.Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
  b.Handan Key Laboratory of Novel Nanobiomaterials, College of materials science and engineering, Hebei University of Engineering, Handan 056000, China
- Author bio：
  
  hanshuai@hebeu.edu.cn (S.H.)
  xsz@mail.ipc.ac.cn (S.Z.X.)
  sunjibin@mail.ipc.ac.cn (J.B.S.)
- Funds：
- DOI：10.1007/s10118-026-3560-6
  CLC：
- Received：11 November 2025，
  
  Accepted：03 January 2026，
  
  Online First：10 March 2026，
  
  Published：05 April 2026
- Accepted：
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Wang, J.; Wang, P. R.; Cheng, X. W.; Zhou, S. Y.; Han, S.; Xiao, S. Z.; Sun, J. B.; Sun, C. H. Thiadiazoloquinoxaline-based donor-acceptor type copolymers towards ultrabroadband optical limiting. Chinese J. Polym. Sci. 2026, 44, 1017–1026

Jiang Wang, Pei-Ran Wang, Xiao-Wei Cheng, et al. Thiadiazoloquinoxaline-based Donor-Acceptor Type Copolymers towards Ultrabroadband Optical Limiting[J]. Chinese Journal of Polymer Science, 2026, 44(4): 1017-1026.
Wang, J.; Wang, P. R.; Cheng, X. W.; Zhou, S. Y.; Han, S.; Xiao, S. Z.; Sun, J. B.; Sun, C. H. Thiadiazoloquinoxaline-based donor-acceptor type copolymers towards ultrabroadband optical limiting. Chinese J. Polym. Sci. 2026, 44, 1017–1026 DOI： 10.1007/s10118-026-3560-6.

Jiang Wang, Pei-Ran Wang, Xiao-Wei Cheng, et al. Thiadiazoloquinoxaline-based Donor-Acceptor Type Copolymers towards Ultrabroadband Optical Limiting[J]. Chinese Journal of Polymer Science, 2026, 44(4): 1017-1026. DOI： 10.1007/s10118-026-3560-6.

摘要

A series of TQ-based narrow-bandgap donor-acceptor conjugated polymers are reported

revealing the effect of chemical structure and intrinsic absorption of copolymer on the reverse-saturated absorption nonlinear optical properties

and achieving ultra-broadband optical limiting from visible to NIR-II region.

Abstract

Construction of electron donor-acceptor (D-A) conjugated system is an established strategy for achieving reverse saturable absorption (RSA) and broadband optical limiting (OL). Nevertheless

organic materials exhibit OL ability across the visible to near-infrared-II spectra range remain scarce. Herein

a series of D-A type

-conjugated copolymers with ultra-narrow bandgaps (0.62–0.76 eV) and strong ICT absorption were synthesized by coupling electron-withdrawing block [1

]

thiadiazolo[3

]

quinoxaline (TQ) with various electron-donating groups (thiophene

selenophene

bithiophene

di(thiophen-2-yl)ethene

and thienothiophene for

–

respectively).

-scan experiments reveal that all copolymers exhibit RSA behaviours at both 532 and 1064 nm

while

and

maintain RSA performance extending to 1600 nm. Among all copolymers

exhibits the strongest RSA performance upon both 532 and 1064 nm laser pulses

with the highest nonlinear absorption coefficient (

eff

) of 51.5 and 49.4 cm·GW

−1

respectively

and the lowest OL onset fluence (

) of 0.31 and 0.38 J·cm

−2

respectively. In contrast

shows optimal RSA property at 1600 nm laser pulse

with

eff

of 13.1 cm·GW

−1

and

of 1.43 J·cm

−2

respectively. Combining the results of

-scan and UV-Vis-NIR experiments

it can be speculated that moderate ground-state absorption

rather than excessively strong absorption

favors superior RSA properties. This work offers valuable insights for designing copolymers with excellent RSA behavior

as well as presents a class of candidate material systems for ultrabroadband optical limiting.

关键词

Keywords

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