New donors

Schobel, U., Egelhaaf, H. J., Brecht, A., Oelkrug, D. and Gauglitz, G. (1999). New donor-acceptor pair for fluorescent immunoassays by energy transfer. Bioconjug. Chem. 15, 1107-14. 

We decided to explore the possibility of performing electric field poling of a NLO-active compound at room temperature and solidifying the material by in-situ photopolymerization. In essence, instead of cooling the sample below Tg, we proposed to raise the Tg of the material above the poling temperature. This paper reports on systems in which the active NLO species is present either as a dopant in a photocrosslinkable host matrix or as the matrix itself. We also describe the preparation and use of several new donor-acceptor stilbene compounds similar to 1. 

An NMR study of stereoelectronic effects in dithiolane sulfoxides such as 35 has appeared <07CEJ4273> and the new donor-acceptor system 36 has been examined for possible use in solar cells. A variety of new crystallographic studies of l,3-dithiole-2-thione structures have... 

In a related fashion there have been attempts to increase the size of the donor and acceptor thus reducing the coulombic repulsion. The extended fulvalenes 124 and 125 would benefit from an appreciable conjugative stabilization upon cation formation [352-356]. The main approach within the search for new donors and acceptors tries to avoid the one-dimensional character of the charge... 

Due to their structural and electrochemical properties, it would appear almost obvious to combine ferrocene-containing fragments and derivatives of tetra-thiafulvalene to construct new donors for conducting CT complexes. This approach would lead to new multistage redox systems that are likely to display different solid state properties to those of their congeners. However, only very few derivatives of this type have been so far reported. What appears to be the first compound belonging to this class was prepared by Ueno et al. in 1980 [64]. Bis(ferrocenyl)tetrathiafulvalene was obtained as a transjcis isomeric mixture (6 and 7, respectively) and was shown to form 1 1 CT complexes with TCNQ and DDQ. These materials possess... 

Hetnarski [110] in a number of papers has described a new donor - ferrocene. It gives EDA complexes with sym-trinitrobenzene, picric acid, picryl chloride while using Job method [109] to establish the ratio between the acceptor and donor. 

The percent recipient in a mixed sample can be calculated by summing the mtensities of the informative recipient peaks and dividing by the sum of the intensities of the informative recipient and donor peaks. Many laboratories then average the percent recipient for each locus to arrive at a final result. Some laboratories run a calibration curve of artificial mixtures of donor and recipient DNA for each tested pair. Other laboratories validate the assay with calibration curves for a number of control donor and recipient mixtures, and do not run new calibration curves for each new donor-recipient pair. 

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