Monitoring Based on Narrow-Band Resonance Raman for "Phase-Shifting" π-Conjugated Polydiacetylene Vesicles upon Host-Guest Interaction and Thermal Stimuli

Chunzhi Cui; Na Yeon Hong; Dong June Ahn

doi:10.1002/smll.201800512

Monitoring Based on Narrow-Band Resonance Raman for "Phase-Shifting" π-Conjugated Polydiacetylene Vesicles upon Host-Guest Interaction and Thermal Stimuli

Small. 2018 Jun;14(24):e1800512. doi: 10.1002/smll.201800512. Epub 2018 May 14.

Authors

Chunzhi Cui^{1

2}, Na Yeon Hong², Dong June Ahn^{2

3}

Affiliations

¹ Department of Chemistry, College of Science, and Key Laboratory of Natural Resource of Changbai Mountains & Functional Molecules, Ministry of Education, Yanbian University, Yanji, 133002, China.
² Department of Chemical and Biological Engineering, Korea University, Seoul, 02841, South Korea.
³ KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul, 02841, South Korea.

PMID: 29761635
DOI: 10.1002/smll.201800512

Abstract

The present study reports a quantified monitoring by means of in situ resonance Raman scattering that analyzes phase-shifting characteristics of π-systems upon interacting with target analytes. A chemo- and thermochromic polydiacetylene vesicular probe is evaluated with multiple-wavelength Raman scattering modes in resonance with its phases, respectively, and thus can trace the phase-shifts. This Raman scattering-based analytical quantification is also successful in monitoring host-guest recognition events by utilizing much narrower bands, compared to those in conventional absorption or photoluminescence (PL) methods. As one of the outcomes, the monitoring analysis overcomes the limitations based on widely used colorimetric response (%CR) or PL that failed in the case of interaction with a surfactant, CTAB.

Keywords: conjugated polymers; narrow-band; phase-shifting probes; resonance Raman spectroscopy.

Publication types

Research Support, Non-U.S. Gov't