title: Excitation induced emission color change based on Eu(III)-Zn(II)-containing polymer complex.
abstract: A novel polymer P-1 is prepared by the reaction of the monomer 5,5'-divinyl-2,2'-bipyridine and Salen-Zn(II) via Heck cross coupling. Interestingly, P-1 can further incorporate with Eu(TTA)(3)·2H(2)O to generate copolymer P-2 with two different metal centers. P-2 exhibits exceptional dual emissive properties which can be tuned by excitation wavelength. For example, an orange fluorescence can be obtained when P-2 is excited at 430 nm, whereas a red emission with a huge Stoke shift of 57 nm is observed when it is excited at 345 nm. The high wavelength emission can be attributed to Eu(III) ((5)D(0)→(7)F(2) ), which is lit by an effective photoinduced energy transfer process between P-1 and the Eu(TTA)(3) complex. The properties of P-2 have led to a better understanding of the energy transfer process between P-1 and Eu(TTA)(3) moieties.
authors.affiliation: Key Lab of Mesoscopic Chemistry of MOE, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, PR China.
authors.forename: Junfeng
authors.initials: J
authors.lastname: Li
authors.forename: Fengyan
authors.initials: F
authors.lastname: Song
authors.forename: Lu
authors.initials: L
authors.lastname: Wang
authors.forename: Jieming
authors.initials: J
authors.lastname: Jiao
authors.forename: Yixiang
authors.initials: Y
authors.lastname: Cheng
authors.forename: Chengjian
authors.initials: C
authors.lastname: Zhu
mesh_terms: D003116:Color; D005063:Europium / Q000737:chemistry*; D005453:Fluorescence; D015394:Molecular Structure; D009942:Organometallic Compounds / Q000138:chemical synthesis / Q000737:chemistry*; D011108:Polymers / Q000138:chemical synthesis / Q000737:chemistry*; D013050:Spectrometry, Fluorescence; D015032:Zinc / Q000737:chemistry*
chemical_list: D009942:Organometallic Compounds; D011108:Polymers; D005063:Europium; D015032:Zinc