Charge-transfer complexes of 2,3-dichloro-5,6-diyano-p-benzoquinone (D.D.Q.) in solution: a conductimetric study

Fluorescein Analogues as Photoremovable Protecting Groups Absorbing at ∼520 nm

“…Charge-transfer (CT) complexes are known to be formed between DDQ and many electron donors such as durene, perylene, pyrene, phenantroline, and aromatic amines . The reduction potential of DDQ ( E [A/A •– ] = +0.51 V in CH 3 CN vs SCE) is higher than that of tetracyanoethylene (+0.24 V in CH 3 CN vs SCE) .…”

“…Charge-transfer (CT) complexes are known to be formed between DDQ and many electron donors 19 such as durene, 20 perylene, pyrene, 21 phenantroline, and aromatic amines. 22 The reduction potential of DDQ (E[A/A •− ] = +0.51 V in CH 3 CN vs SCE) 19 is higher than that of tetracyanoethylene (+0.24 V in CH 3 CN vs SCE). 23 On the other hand, xanthene dyes, such as fluorescein (E[D •+ /D] = −1.22 V for fluorescein in acetonitrile vs SCE) 24 are good electron donors.…”

Conductimetric Studies of Charge Transfer Complexes of p‐Chloranil with Some Alicyclic Amines in Polar Media

“…The formation of such inner (charge transfer) complexes can be followed by measuring the changes in the electrical conductivities of the solutions. [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19] In highly polar media one may be able to obtain the stoichiometry of the complex by measuring the electrical conductivities of the solutions, 4 as the usual Job's continuous variation procedure is of limited application particularly when the outer complex is transformed into an inner complex (due to environmental cooperation), leaving behind only a small amount of neutral unionised complex in solution. The importance of conductimetric studies of electron donor acceptor (EDA) complexes is increasing rapidly on account of their use as semiconductors.…”

“…The importance of conductimetric studies of electron donor acceptor (EDA) complexes is increasing rapidly on account of their use as semiconductors. 11,14 Therefore, the object of the present paper is to study the formation of EDA complexes of morpholine, piperidine and pyrrolidine with p-chloranil as p-acceptor in N,N-dimethylformamide, acetonitrile and dimethylsulfoxide at temperatures of 10, 15, 18, 20, 25 and 30°C by applying a conductimetric technique, 4,20,21 in order to obtain information on the stoichiometry of the complex in polar media, the effect of temperatures and dielectric constant of the medium on the electrical conductivities in solution.…”

Spectrophotometric and Conductometric Studies of Charge Transfer Interaction of 2‐(1H)‐Pyridinethione with π‐Acceptors

“…The importance of conductometric studies of electron donor acceptor (EDA) complexes is increasing rapidly on account of their use as semi conductors. 22,23 Therefore, conductometric measurements in N,Ndimethylformamide at 20, 25 and 30°C on the formation of charge transfer complexes have been studied. Table 1, the UV/Vis absorption maxima obtained by mixing both donor and acceptor components in N,N-dimethylformamide as solvent fall in the range 320-465 nm.…”