| 摘要 |
<p>4 - Nitro - 41 - naphtho [1 : 2-d] - 1 : 2 : 3 - triazoly (2)-stilbene is made by oxidizing the corresponding 2 - amino - naphthalene - azostilbene with lead (IV) oxide. 3 - Mercapto - quinolino [2 : 1-c] - 1 : 2 : 4 - triazole is made by treating 2-hydrazinoquinoline with allyl isothiocyanate and cyclizing the semicarbazide derivative so formed.ALSO:The polymeric photoconductive compositions of Specifications 964,875, including compositions based on poly-N-vinyl-carbazole itself, are modified by including therein as sensitizer a triazole, which may be substituted, or a condensed-ring compound containing a triazole nucleus. A dye of the rhodamine type may also be present. The preferred polymers are poly-N-vinyl-carbazole and copolymers thereof with methyl methacrylate. Suitable triazole compounds are mentioned. Specifications 856,770, 964,873 and 964,884 also are referred to.</p> |
