Alternating dialkylsilylene-divinylarene copolymers

2010 ◽  
Vol 82 (3) ◽  
pp. 613-624 ◽  
Author(s):  
Tien-Yau Luh
Keyword(s):  
Electron Transfer ◽  
Energy Transfer ◽  
Photoinduced Electron Transfer ◽  
Photophysical Properties ◽  
Polymeric Chain ◽  
Recent Advances

A summary of recent advances in the chemistry and photophysics of alternating dialkylsilylene-divinylarene copolymers is presented. The silicon moieties are considered to be insulating tetrahedral spacers in these copolymers. The substituents on silicon can readily be tuned, and the steric environment of these substituents around the silicon may dictate the conformation (or helicity) of the copolymers (the Thorpe–Ingold effect) and hence their photophysical properties. Because different chromophores can be regioregularly introduced into the polymeric chain, these copolymers have been used as models to study energy transfer and photoinduced electron transfer (PET), as well as chiroptical transfer.

Multifunctionalized octamethoxy-[8]cycloparaphenylene: facile synthesis and analysis of novel photophysical and photoinduced electron transfer properties

2019 ◽  
Vol 6 (11) ◽  
pp. 1885-1890 ◽  
Author(s):  
Shengsheng Cui ◽  
Guilin Zhuang ◽  
Jinyi Wang ◽  
Qiang Huang ◽  
Shengda Wang ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Emission Spectrum ◽  
Photoinduced Electron Transfer ◽  
Photophysical Properties ◽  
Hypsochromic Shift ◽  
Facile Synthesis ◽  
Electron Transfer Properties ◽  
Transfer Properties

A novel multifunctionalized carbon nanoring was facilely synthesized, which demonstrates an unusual hypsochromic shift in the emission spectrum with interesting photophysical properties.

Photophysical Properties of cis-Mo2 Quadruply Bonded Complexes and Observation of Photoinduced Electron Transfer to Titanium Dioxide

2014 ◽  
Vol 136 (32) ◽  
pp. 11428-11435 ◽  
Author(s):  
Samantha E. Brown-Xu ◽  
Malcolm H. Chisholm ◽  
Christopher B. Durr ◽  
Terry L. Gustafson ◽  
Thomas F. Spilker
Keyword(s):  
Electron Transfer ◽  
Titanium Dioxide ◽  
Photoinduced Electron Transfer ◽  
Photophysical Properties ◽  
Bonded Complexes ◽  
Quadruply Bonded Complexes

Photophysical properties of self-assembling porphinatozinc and photoinduced electron transfer with fullerenes

2003 ◽  
Vol 07 (06) ◽  
pp. 405-414 ◽  
Author(s):  
Mitsunari Itou ◽  
Mamoru Fujitsuka ◽  
Yasuyuki Araki ◽  
Osamu Ito ◽  
Hiroaki Kido
Keyword(s):  
Electron Transfer ◽  
Rate Constants ◽  
Photoinduced Electron Transfer ◽  
Photophysical Properties ◽  
Zigzag Chain ◽  
Annihilation Process ◽  
Time Resolved ◽  
Axial Ligation ◽  
Self Assembling ◽  
Triplet Excited States

Photochemical and photophysical properties of self-assembling 5-(4-pyridyl)-10,15,20-triphenylporphinatozinc ( Znpyp 3) have been studied by steady-state and time-resolved absorption in addition to time-resolved fluorescence spectroscopy. Self-assembling oligomers ( Znpyp 3)n( n = 3 at 0.1 mM) were synthetically generated and assigned to a zigzag chain oligomeric structure, where n is dependant on the concentration and temperature. The lifetimes of the singlet and triplet excited states of ( Znpyp 3)n depend on n and the axial ligation. The rate-constant of ( Znpyp 3)n for the intermolecular T-T annihilation process was smaller than that of monomeric porphyrins. In the photoinduced electron-transfer to fullerenes ( C 60 and C 70), it was revealed that the rate-constants and efficiencies for ( Znpyp 3)n were essentially the same as those of the monomer. In the back electron transfer, the rate-constants of oligomers were smaller than that of the monomeric porphyrin, which suggests hole-delocalization along the porphyrin chain.

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