Electrophotographic photoconductor, process for forming an image, image forming apparatus and a process cartridge for the same
申请人:——
公开号:US20030190540A1
公开(公告)日:2003-10-09
Providing an electrophotographic photoconductor comprising a conductive support and a photoconductive layer disposed on the photoconductive support; wherein the photoconductive layer contains an azo compound expressed by a general formula <<1>>.
Ar &Parenopenst;N═N—Cp)
n
general formula <<1>>
(in the general formula <<1>>, Ar expresses one of a substituted or non-substituted aromatic carbon hydride group and heterocyclic ring aromatic series group which can be combined by way of a bond group; Cp expresses a coupler residual group; n expresses an integer of one of 1, 2, 3, and 4; at least one of the Cp is a coupler residual group selected from one of the following general formulae <<2>>, <<3>>, and <<4>>.)
1
Dye-Sensitized Photooxygenation of the CN Bond. 5. Substituent Effects on the Cleavage of the CN Bond of <i>C</i>-Aryl-<i>N</i>-aryl-<i>N</i>-methylhydrazones<sup>1</sup>
作者:Ihsan Erden、Pinar Ergonenc Alscher、James R. Keeffe、Colin Mercer
DOI:10.1021/jo050014t
日期:2005.5.1
involved in the mechanism. We postulate a mechanism in which the initial event is exothermic electron transfer from the hydrazone to 1O2 leading to an ion−radical caged pair. Subsequent covalent bondformation between the hydrazone carbon and an oxygen atom is rate controlling. The transition state for this step also has a lower enthalpy than the starting reactants, but the free energy of activation
标题化合物在C干净地切割由单线态氧N键(1 Ò 2,1 Δ克得到芳醛)和ñ -芳基- Ñ -methylnitrosamines。这些反应在-78°C处比在室温下发生的速度更快。使用竞争性方法研究了取代基在C-芳基和N-芳基上的变化的影响。所得率比的良好的相关性与取代基常数(σ -或σ +所获得的)产生很小到非常小的ρ值,表明反应物和决定速率的过渡态之间的电荷分布从很小到很小。C-芳基部分上的吸电子基团通过preferential的优先稳定化而在某种程度上延迟了反应。另一方面,电子给体稍微稳定了决定过渡态的速率。N-芳基上的取代基几乎没有作用。未观察到3,5-二叔丁基苯酚的抑制作用,表明该机制未涉及自由基(未老化的)自由基中间体。我们假设一种机制,其中初始事件是放热电子从hydr到1 O 2的转移导致离子自由基笼对。carbon碳和氧原子之间随后的共价键形成是速率控制的。该步骤的过渡状态也
Electrophotographic photoconductor, process for forming an image, image forming apparatus and process cartridge for the same
申请人:Shoshi Masayuki
公开号:US20050112487A1
公开(公告)日:2005-05-26
Providing an electrophotographic photoconductor comprising a conductive support and a photoconductive layer disposed on the photoconductive support; wherein the photoconductive layer contains an azo compound expressed by a general formula <<1>>.
ArN═N—Cp)
n
general formula <<1>>
(in the general formula <<1>>, Ar expresses one of a substituted or non-substituted aromatic carbon hydride group and heterocyclic ring aromatic series group which can be combined by way of a bond group; Cp expresses a coupler residual group; n expresses an integer of one of 1, 2, 3, and 4; at least one of the Cp is a coupler residual group selected from one of the following general formulae <<2>>, <<3>>, and <<4>>.)
A photosensitive material for electrophotography having high sensitivity and excellent durability, which comprises a photosensitive layer containing at least one of azo compounds having a tetraphenylthiophene or tetraphenylthiophene 1,1-dioxide skeleton.
Electrophotographic photoreceptor, process for producing the same, and image forming apparatus using same
申请人:Sharp Kabushiki Kaisha
公开号:EP0926557A1
公开(公告)日:1999-06-30
The invention enables the forming of a highly characteristic image using an electrophotographic photoreceptor the charge-generating layer of which can be produced with better coating properties and which is highly sensitive and electrostatically highly stable in repeated use. The charge-generating layer of a function-separated type photoreceptor contains a τ-type non-metallic phthalocyanine and a vinyl chloride-vinyl acetate copolymer. The weight ratio of τ-type non-metallic phthalocyanine to the vinyl chloride-vinyl acetate copolymer is preferably 1/3 to 3/1 by weight and the copolymer is suitably of vinyl chloride and vinyl acetate, vinyl chloride, vinyl acetate and maleic acid or vinyl chloride, vinyl acetate and vinyl alcohol, especially one containing at least 10% by weight of vinyl alcohol.