Association behavior and fluorescence quenching between cationic zinc porphyrin pendant groups on water-soluble polymers and anionic iron porphyrin guests
- 40 Downloads
An amphiphilic cationic tripyridiniumylporphyrin monomer, i.e., ZnTrMPyP, was synthesized and copolymerized with acrylamide in water and dimethyl sulfoxide, respectively, to prepare the water-soluble random copolymer P-D and microblock copolymer P-W. The association behavior and fluorescence quenching between the copolymers and tetra(p-sulfonato phenyl)porphyrin (Fe(III)TSPP(Cl)) were studied via absorption and emission spectra. The results showed that relatively discrete pendant groups of ZnTrMPyP within P-D could form a ground state complex with FeTSPP by electrostatic interactions, and both static and dynamic mechanisms were active in this quenching process. In contrast, the microblock porphyrin pendant groups within P-W interacted with FeTSPP as an entity, and static quenching was dominant in this process. Salt effects on the formation of the copolymers and FeTSPP complex were also investigated through the addition of KNO3, and the results showed that this association can be weakened by the electrostatic shielding effect, and the fluorescence quenching constant could be reduced.
KeywordsPorphyrin Water-soluble polymer Association behavior Fluorescence quenching
This work was supported by the National Natural Science Foundation of China (Grant No. 21502148).
Compliance with ethical standards
Conflict of interest
The authors declare that they have no conflict of interest.
- 9.Kamachi M, Cheng XS, Kida T, Kajiwara A, Shibasaka M, Nagata S (1987) Synthesis of new polymers containing porphyrins in their side chains: radical polymerizations of 5-[4-(acryloyloxy)phenyl]-10,15,20-triphenylporphyrin and 5-[4-(methacryloyloxy)phenyl]-10,15,20-triphenylporphyrin. Macromolecules 20:2665–2669CrossRefGoogle Scholar
- 10.Konishi T, Ikeda A, Asai M, Hatano T, Shinkai S, Fujitsuka M, Ito O, Tsuchiya Y, Kikuchi JI (2003) Improvement of quantum yields for photoinduced energy/electron transfer by isolation of self-aggregative Zinc tetraphenyl porphyrin-pendant polymer using cyclodextrin inclusion in aqueous solution. J Phys Chem B 107:11261–11266CrossRefGoogle Scholar
- 27.Ding KW, Li TQ, Ge ZX, Bu JH, Liu Y (2018) The sequential structure of tripyridiniumylporphyrin pendant groups in water-soluble copolymers and their association behaviour with tetrasulfonatophenylporphyrin guests: UV-vis absorption and fluorescence emission spectra study. RSC Adv 8:35759–36767CrossRefGoogle Scholar
- 42.Batinić-Haberle I, Spasojević I, Hambright P, Benov L, Crumbliss AL, Fridovich I (1999) Relationship among redox potentials, proton dissociation constants of pyrrolic nitrogens, and in vivo and in vitro superoxide dismutating activities of manganese(III) and iron(III) water-soluble porphyrins. Inorg Chem 38:4011–4022CrossRefGoogle Scholar