Issue 32, 2017

Highly emissive poly(maleic anhydride-alt-vinyl pyrrolidone) with molecular weight-dependent and excitation-dependent fluorescence

Abstract

Nonconventional luminescent polymers have attracted rapidly growing attention owing to their importance in the fundamental understanding of fluorescence mechanisms and potential practical applications. However, most non-conjugated luminogens exhibit weak blue emission. Incorporating different nonconventional chromophores and adjusting molecular structures of polymers are assumed to enable the formation of more conformations with strong intra- and/or interchain interactions, leading to strong and red-shifted emissions. In this work, we synthesized poly(maleic anhydride-alt-vinyl pyrrolidone) (PMVP) copolymers with different molecular weights through a conventional free radical precipitation copolymerization method. The emissions of PMVPs are significantly red-shifted in comparison to those of the homopolymers poly(maleic anhydride) and poly(N-vinyl-2-pyrrolidone). The PMVPs exhibit aggregation-induced emission (AIE) characteristics, as they are highly emissive in concentrated solutions or in the solid state. The PMVPs also exhibit significant molecular weight-dependent fluorescence (MWDF) and excitation-dependent fluorescence (EDF). The photoluminescence (PL) intensity of their DMSO solutions increases with decreasing molecular weight and their maximal emission wavelength (λmaxex) is red-shifted. Moreover, they can emit a wide range of colours from blue to red under different excitation wavelengths. Very impressively, poly(itaconic anhydride-co-vinyl pyrrolidone) (PIVP) copolymers with a lower chain rigidity emit very strong red emission at about 600 nm in a wide excitation wavelength range, which is rarely reported for non-conjugated luminogens. This study may shed some light on the preparation of nonconventional luminescent polymers with strong and red-shifted fluorescence emission.

Graphical abstract: Highly emissive poly(maleic anhydride-alt-vinyl pyrrolidone) with molecular weight-dependent and excitation-dependent fluorescence

Supplementary files

Article information

Article type
Paper
Submitted
31 Мам. 2017
Accepted
14 Шіл. 2017
First published
15 Шіл. 2017

J. Mater. Chem. C, 2017,5, 8082-8090

Highly emissive poly(maleic anhydride-alt-vinyl pyrrolidone) with molecular weight-dependent and excitation-dependent fluorescence

C. Shang, N. Wei, H. Zhuo, Y. Shao, Q. Zhang, Z. Zhang and H. Wang, J. Mater. Chem. C, 2017, 5, 8082 DOI: 10.1039/C7TC02381B

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements