Donor/acceptor substituent

Jeevarajan, J. A. and L. D. Kispert (1996). Electrochemical oxidation of carotenoids containing donor/acceptor substituents. J. Electroanal. Chem. 411 57-66. 

Although the metal electronic configuration exerts a profound influence on f3 in (128)-(130), the situation is rather different if the ligands bear strong electron donor/acceptor substituents. For example, in (131) and (132) the (3 responses are dominated by two ILCT excitations with the... 

Control of the charge injection and transport by introduction of electron donor-acceptor substituents (or comonomers and end-capping groups)... 

Donor-acceptor substituents on the dibenzothienylethene structure induced an increased reactivity (06T6814). 

Recent theoretical work on two-dimensional charge transfer molecules containing cumulene moieties indicate that just as in the case of the real part of the third-order susceptibilities (see Sect. 4.3) two-dimensionality can also increase the imaginary part [89] and lead to large two-photon absorption in the visible spectral region (Fig. 30). Donor-acceptor substituents further increase <5 in the visible range. 

Upon introduction of donors and acceptors in an unsymmetrical way (TPE-DA), the energy gap should at first narrow, then widen again for stronger donor/acceptor substituents, according to the BCT model. For weak substituents, the narrowing of the gap has already been shown through the shortening of the lifetimes [92,93]. 

The electron donor-acceptor substituent constant k is an electronic constant proposed to measure the ability of a group to modify the stability of an electron donor-acceptor complex that is often referred to as charge transfer complex [Foster, Hyde et al, 1978 Livingstone, Hyde et al, 1979]. It is defined as... 

Okano, K. Shishido, A. Ikeda, T. (2006). Photochemical Phase Transition Behavior of Highly Birefringent Azo-Tolane Liquid-Crystalline Polymer Films Effects of the Position of the Tolane Group and the Donor-Acceptor Substituent in the Mesogen. Macromolecules, 2006,39,145-152. 

Fig. 7 The charge transfer paths of three PDA derivatives with donor-acceptor substituent.

Donor-Acceptor substituent effects One approach to band gap reduction relies... 

Okano,K.,Shishido, A. and Ikeda,T. (2006a) Photochemical phase transition behavior of highly birefringent azotolane liquid-crystalline polymer films Effects of the position of the tolane group and the donor-acceptor substituent in the mesogen , Macromolecules, 39,145-152. 

DAOPE Oligo(phenyleneethynylene) with terminal donor-acceptor substitu-... 

Conjugated oligomers, possessing donor and acceptor substituents, have been a prominent class of compounds in material science. Two dimensionally conjugated benzenes, bearing three pairs of donor-acceptor substituents, were synthesized by... 

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