title: Ultraviolet, circular dichroism, fluorescence, and circularly polarized luminescence spectra of regioregular poly-[3-((S)-2-methylbutyl)-thiophene] in solution.
abstract: Ultraviolet (UV), Circular Dichroism (CD), Fluorescence, and Circularly Polarized Luminescence (CPL) spectra were recorded for mixed chloroform/methanol and chloroform/butanol solutions of regioregular poly[3-((S)-2-methylbutyl)-thiophene]. An evaluation of the chiral and nonchiral components in solution is proposed on the basis of the UV and CD spectra. The fluorescence and CPL spectra are observed in a wavelength range where some UV and CD activity still appears. For this reason, the observed CPL features are strongly influenced by CD. A general procedure for evaluating true CPL spectra is proposed, when absorption and emission coexist.
authors.affiliation: Dipartimento di Scienze Biomediche e Biotecnologie, Università di Brescia, Brescia, Italy.
authors.forename: Ettore
authors.initials: E
authors.lastname: Castiglioni
authors.forename: Sergio
authors.initials: S
authors.lastname: Abbate
authors.forename: France
authors.initials: F
authors.lastname: Lebon
authors.forename: Giovanna
authors.initials: G
authors.lastname: Longhi
mesh_terms: D002942:Circular Dichroism; D011108:Polymers / Q000737:chemistry*; D012996:Solutions; D013050:Spectrometry, Fluorescence; D013056:Spectrophotometry, Ultraviolet; D013057:Spectrum Analysis; D013237:Stereoisomerism; D013876:Thiophenes / Q000737:chemistry*
chemical_list: D011108:Polymers; D012996:Solutions; D013876:Thiophenes; C579489:poly-(3-((S)-2-methylbutyl)-thiophene)