Conversion of silver images on silver halide photographic materials into silverless ones consisting of iron(III) chelates with 8-sulfanylquinoline and some of its derivatives

Gelatin-immobilized metal complexes: synthesis and applications

“…Silverless images obtained from other metal chelates are less observed [141,[223][224][225][226][227][228][229][230]. In particular, technologies for the production of silverless images consisting of Ni(II) chelates with dimethylglyoxime [190][191][192][193], 8-mercaptoquinoline [194][195][196][197], dithiooxamide and N,N 0 -diphenyldithiooxamide [198][199][200][201][202][203][204][205], quinoxaline-2,3-dithiol [204], N,N 0 -diphenylthiooxamide [207], macrocyclic ligand-2,8-dithio-3,7-diaza-5-oxa-nonandithioamide-1,9 [208], Cu(II) chelates with -benzoinoxime [215,217], dithio-oxamide [190-192, 209, 210], 1,2-dithiocarbamylhydrazine [212], some bulky 3-benzoylthioureas [218][219][220][221][222], Co(II) chelates with nitrosonaphthols [223,224], Co(III) chelates with dithiooxamide [225][226][227], Fe(III) chelates with various 8-mercaptoquinolines [141] and even UO 2 (VI) with 8-mercaptoquinoline …”

“…It is then possible to shorten the time required to obtain the silverless metal chelate image and to improve the efficiency and accelerate oxidation of the elemental silver to the corresponding silver(I) compounds (Ag 4 [Fe(CN) 6 ] or AgCl) [192]. Technological processes of this type have been described in the literature [141,. Most of these publications have been …”

“…The blue or ultramarine images obtained from [Ni(HL) 2 ] n chelate (H 2 L is dithiooxamide) are distinguished by a greater purity of light lines, and greater photostability. Yet another important quality of this procedure is that, in contrast to all other processes for the intensification of photographic images known hinherto [34,35], in many cases it does not increase but actually diminishes the (4) and 10 min (5) [141]. The optical densities D were measured using a blue filter with a transmission maximum at 450 nm.…”

“…The typical kinetic curves of formation for silverless photographic images are presented in figure 8. The formation of silverless images consisting from Ni(II) chelates with dithiooxamide is most interesting [198][199][200][201][202][203][204][205]. It has been used, for example, for the preparation of blue slides [199][200][201].…”

“…V. Mikhailov devoted to synthesis of silverless images from Ni(II) chelates [193][194][195][196][197][198][199][200][201][202][203][204][205][206][207][208]; a somewhat smaller number have been devoted to silverless images consisting of Cu(II) chelates [209][210][211][212][213][214][215][216][217][218][219][220][221][222]. Silverless images obtained from other metal chelates are less observed [141,[223][224][225][226][227][228][229][230]. In particular, technologies for the production of silverless images consisting of Ni(II) chelates with dimethylglyoxime [190][191][192][193], 8-mercaptoquinoline [194][195][196][197]…”