Synthesis and properties of open-cage fullerene C60 derivatives: impact of the extended π-conjugation

2018 ◽  
Vol 2 (2) ◽  
pp. 206-213 ◽  
Author(s):  
Yoshifumi Hashikawa ◽  
Hidefumi Yasui ◽  
Kei Kurotobi ◽  
Yasujiro Murata
Keyword(s):  
Charge Transfer ◽  
Intramolecular Charge Transfer ◽  
Fullerene C60 ◽  
Long Wavelength ◽  
Charge Transfer Transitions ◽  
Wavelength Absorption ◽  
C60 Derivatives

Novel open-cage fullerene C60 derivatives with extended π-conjugation bearing thiophene rings exhibit long wavelength absorption due to characteristic intramolecular charge transfer transitions.

Solvatochromic study of internal charge transfer in 7,7-disubstituted quinone methides

1983 ◽  
Vol 48 (8) ◽  
pp. 2376-2385 ◽  
Author(s):  
Libuše Pavlíčková ◽  
Bohumír Koutek ◽  
Václav Jehlička ◽  
Milan Souček
Keyword(s):  
Charge Transfer ◽  
Absorption Band ◽  
Transition Energy ◽  
Intramolecular Charge Transfer ◽  
Quinone Methides ◽  
Long Wavelength ◽  
Wavelength Absorption ◽  
Internal Charge Transfer ◽  
Long Wavelength Absorption Band ◽  
Internal Charge

Electronic spectra of 7,7-disubstituted quinone methides I-III with substituents of various electronegativities were measured in thirteen solvents. Character of the long-wavelength transition was investigated by correlation between transition energy and ionization potential of the donor part of the molecule as well as by comparison of transition moment with Δμ. The long wavelength absorption band of Ia-Id, IIa and IV does not correspond to a pure (π-π*) transition, but it is perturbed by intramolecular charge transfer.

ChemInform Abstract: OPTICAL ACTIVITY OF INTRAMOLECULAR CHARGE-TRANSFER TRANSITIONS

1975 ◽  
Vol 6 (33) ◽  
pp. no-no
Author(s):  
ANTON J. DE GEE ◽  
WALTHERUS J. SEP ◽  
JAN W. VERHOEVEN ◽  
THYMEN J. DE BOER
Keyword(s):  
Charge Transfer ◽  
Optical Activity ◽  
Intramolecular Charge Transfer ◽  
Charge Transfer Transitions

Photolysis of Naphthol Green B in Aqueous Solution. Photoreduction of Fe(III) Induced by Ligand-to-Metal Charge Transfer Excitation

2003 ◽  
Vol 58 (9) ◽  
pp. 922-924 ◽  
Author(s):  
Horst Kunkely ◽  
Arnd Vogler
Keyword(s):  
Aqueous Solution ◽  
Charge Transfer ◽  
Quantum Yield ◽  
Metal Charge ◽  
Long Wavelength ◽  
Mlct Transition ◽  
Wavelength Absorption ◽  
Charge Transfer Excitation ◽  
Naphthol Green B ◽  
Metal Charge Transfer

The intense long-wavelength absorption of Naphthol Green B at λmax = 712 nm is assigned to a ligand-to-metal charge transfer (MLCT) transition. LMCT excitation of the complex in aqueous solution leads to the reduction of Fe(III) to Fe(II) with a quantum yield of ϕ = 1.14×10−3 at λirr = 577 nm.

Spectroscopic Studies of Some Drugs of Toxicological Interest. Part II. p-Aminobenzoic Acid Drugs

1969 ◽  
Vol 23 (3) ◽  
pp. 254-256 ◽  
Author(s):  
A. Mustafa ◽  
R. Abu-Eittah ◽  
S. Elgendi
Keyword(s):  
Charge Transfer ◽  
Benzoic Acid ◽  
Absorption Spectra ◽  
Electronic Absorption ◽  
Intramolecular Charge Transfer ◽  
Electronic Absorption Spectra ◽  
Spectroscopic Studies ◽  
Aminobenzoic Acid ◽  
Long Wavelength ◽  
Amino Benzoic Acid

The electronic absorption spectra of some drugs derived from p-amino benzoic acid were studied. The effect of the substituent on the position of band maxima and intensity has been rationalized. Long wavelength energies have been found to agree well with calculated energies of the intramolecular charge transfer bands.

Photoreactivity of Titanocene Pentasulfide

1998 ◽  
Vol 53 (2) ◽  
pp. 224-226 ◽  
Author(s):  
Horst Kunkely ◽  
Arnd Vogler
Keyword(s):  
Charge Transfer ◽  
Electronic Spectrum ◽  
Elemental Sulfur ◽  
Reductive Elimination ◽  
Metal Charge ◽  
Long Wavelength ◽  
Wavelength Absorption ◽  
Metal Charge Transfer

Abstract The electronic spectrum of Cp2TiS5 shows a long-wavelength absorption at λ max = 492 nm which is assigned to the lowest-energy S52- → TiIV ligand-to-metal charge transfer (LMCT) transition. The photolysis of the complex in CH2CI2 leads to the formation of Cp2TiCl2 and elemental sulfur. It is suggested that LMCT excitation initiates a reductive elimination with the extrusion of S5 while the reduced titanocene is reoxidized by the solvent.

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