Oligothiophene Isothiocyanates as a New Class of Fluorescent Markers for Biopolymers
作者:Giovanna Barbarella、Massimo Zambianchi、Olga Pudova、Vanessa Paladini、Alfredo Ventola、Francesco Cipriani、Giuseppe Gigli、Roberto Cingolani、Gennaro Citro
DOI:10.1021/ja011209v
日期:2001.11.1
The regioselective synthesis of fluorescent oligothiophene isothiocyanates is described. The isothiocyanates were reacted with bovine serum albumin (BSA) following standard procedures and the optical properties of the oligothiophene-BSA conjugates were analyzed as a function of oligomer concentration, time, and irradiation power. The oligothiophene-BSA conjugates were chemically very stable and their photoluminescence characteristics persisted unaltered for several months. Photoluminescence data relative to the conjugate of an oligothiophene-S,S-dioxide isothiocyanate with monoclonal anti-CD8 antibody are reported. No fluorescence quenching was observed following the binding of the isothiocyanate to the antibody and the conjugate displayed high chemical stability and photostability.