Photochemical properties of a Re(I) polymer containing dppz in its structure. An interplay between dark and bright states of dppz

Energy Transfer between CNT Surface and −Re(CO)3(phen)+* Pendants Grafted to P4VP in Nanohybrid Shish-Kebob-like Structures

“…A broad unstructured band centered at λ ∼ 550 nm is observed in the emission spectrum of RePVP when a deaerated solution of the polymer in CH 3 CN is irradiated at 350 nm. , A similar luminescence of the Re­(I) chromophores is observed in MeOH/H 2 O mixtures, which can be attributed to the relaxation of the 3 MLCT excited state of the pendent −[Re­(CO) 3 (phen)] + in RePVP. Luminescence quantum yields of RePVP, Φ L , were measured under different experimental conditions, see Table .…”

“…At C RePVP > 30 ppm there is an abrupt change in the slope. Φ L dependences on C RePVP like those of eqs – are manifestations of the effect of polymers morphological changes on the photophysical properties of the Re­(I) chromophores . The photophysical observations may be interpreted therefore in terms of charge-transfer excited states: medium-destabilized charge-transfer excited states, labeled 3 MLCT md , present in some chromophores within a strand of a polymer.…”

“…In the last two decades, we have focused our research interests on the study of the photochemical and morphological properties of Re­(I) polymeric complexes. The polymers used in our works have been derived from the P4VP backbone, and they contain fac -XRe­(CO) 3 L pendants in their structure. − The Re­(I) polymers are polyelectrolytes where Re­(I) center coordinates one of every three pyridines present in the P4VP. They display interesting as well as intriguing features both in photochemistry and in material science.…”

“…Φ L dependences on C RePVP like those of eqs 1−4 are manifestations of the effect of polymers morphological changes on the photophysical properties of the Re(I) chromophores. 24 The photophysical observations may be interpreted therefore in terms of charge-transfer excited states: medium-destabilized charge-transfer excited states, labeled 3 MLCT md , 24 present in some chromophores within a strand of a polymer. 3 MLCT md excited states may decay to the ground state, or they can transfer their excess electronic energy to other chromophores where medium-stabilized charge-transfer excited states, 3 MLCT ms , are produced.…”

Morphology-dependent Photophysical Properties of Poly-4-vinylpyridine Polymers Containing –Re(CO)3(N^N)+ Pendants

“…34 However, little attention was paid to Re(I) polymeric complexes, and only a few examples can be found in the literature up to the beginning of the new century. 35 After 2000, however, there has been a huge development in the field, mainly due to our research, 19,[36][37][38][39][40][41][42][43][44][45][46] and the work of the research group led by Chan. 47,48…”