Direct positive silver halide photographic light-sensitive material
申请人:Fuji Photo Film Co., Ltd.
公开号:US04719174A1
公开(公告)日:1988-01-12
A direct positive silver halide photographic light-sensitive material is described containing a weak electron donative, adsorptive compound represented by formula (I) or (II) effective for depressing formation of a re-reversed negative image, which is not a spectral sensitizing agent for silver halide or a nucleating agent: D--L--X (I) D--X (II) wherein D represents electron donative atoms comprising an aromatic ring or hereto ring, which is unsubstituted or substituted; L represents a linking group containing at least one of C, N, S and O and an atom or atoms necessary for cutting a .pi.-conjunction system; and X represents a group which is adsorptive with respect to silver halide and contains at least one of C, N, S, O and Se.
描述了一种含有弱电子给体、吸附化合物的直接正像银卤片光敏材料,该化合物由式(I)或(II)表示,能够有效抑制反转负像的形成,该化合物不是银卤的光谱感光剂或成核剂:D--L--X (I) D--X (II) 其中,D代表电子给体原子,包括未取代或取代的芳香环或杂环;L代表包含至少一个C、N、S和O的连接基团以及必要的切断π-共轭系统的原子或原子;X代表对银卤吸附的基团,包含至少一个C、N、S、O和Se。
Electronic and steric substituent effects on the fluorescence emission of 2‐pyrazoline derivatives
aryl rings. In addition, the effects of the concentration and the solvent polarity on the fluorescence emission were studied. Density functional theory (DFT) calculations were carried out to gain insight into the geometric, electronic, and spectroscopic properties of the pyrazoline derivatives. The results of both experimental and computational studies explain the effects of the geometrical orientation