作者:Stéphanie Delbaere、Gaston Vermeersch、Michel Frigoli、Georg H. Mehl                                    
                                    
                                        DOI:10.1021/ol101672v
                                    
                                    
                                        日期:2010.9.17
                                    
                                    The coexistence of 18 isomers, identified by NMR spectroscopy and gathered into six states with very different absorption properties, is observed upon irradiation with selective wavelengths of a triphotochromic system joining two naphthopyran entities through a dithienylethene bridge. The sequential electronic coupling of photochromic groups resulted in an absorption behavior reaching far into NIR.