Gelatin-immobilized Matrix Systems Research Articles

Electrophilic substitution in the d-metal hexacyanoferrate(II) gelatin-immobilized matrix systems

AbstractData of electrophilic substitution processes proceeding into thed-metal hexacyanoferrate(II) gelatin-immobilized matrix systems when they are in contact with aqueous solutions of chlorides ofd-elements have been systematized and generalized. The bibliography includes 94 references.

Quantum-chemical modeling of template synthesis in the ternary system metal(II) ion-thiosemicarbazide-diacetyl

The products that can potentially form in template synthesis from doubly charged 3d-metal ions M(II), thiosemicarbazide H2N-HN-C(=S)-NH2, and diacetyl H3C-C(=O)-C(=O)-CH3 in gelatinimmobilized matrix systems have been modeled using the non-hybrid density functional method DFT OPBE/TZVP with the Gaussian09 program. The molecular structure parameters and thermodynamic characteristics of the most stable macrotricyclic Mn(II), Fe(II), Co(II), Ni(II), Cu(II), and Zn(II) complexes with the (NSSN)-coordination of the ligand donor sites and their crystallographic characteristics have been calculated. In all the complexes, the chelate core is coplanar with the chelate rings.

Self-assembly of supramolecular Zn(II) complex with 2,7-dithio-3,6-diazaoctadien-3,5-dithioamide-1,8 into zinc(II)hexacyanoferrate(II) gela-tin-immobilized matrix

Normal 0 Novel complexing process in the Zn(II)– ethanedithioamide– ethanedial triple system proceeding into nano -reactors of zinc(II)hexacyanoferrate(II) gelatin-immobilized matrix systems under a contact with aqueous-alkaline (pH~12) solutions containing ethanedithioamide and ethanedial, has been studied. It has been shown that self-assembly (template synthesis) of supramolecular (555)macrotricyclic Zn(II) coordination compound with chelating ligand 2,7-dithio-3,6-diazaoctadien-3,5-dithioamide-1,8,occurs under such specific conditions. Besides, ethanedithioamide and ethanedial act as ligand synthons in this process.

On template synthesis in the ternary system Ni(II)-thiosemicarbazide-diacetyl

A new complexation process in the ternary system Ni(II)-hydrazinomethanethioamide (thiosemicarbazide)-2,3-butanedione (diacetyl) has been studied. Complexation occurs in an aqueous ethanol solution and in nickel(II) hexacyanoferrate(II) gelatin-immobilized matrix systems. It has been shown that, under these conditions, the process involves the “self-assembly” (template synthesis) of Ni(II) macrotricyclic complexes with a new chelating ligand—4,5-dimethyl-1,8-dimercapto-2,3,6,7-tetraaza-1,3,5,7-octatet-raene-1,8-diamine with the (NSSN) coordination of donor atoms to the metal atom.

Self-assembly of supramolecular Ni(II) and Cu(II) metalmacrocyclic compounds with tetraazamacrocyclic ligand into a gelatin-immobilized matrix

Self-assembly in M(II)-ethanedithioamide [H2N–C(=S)–C(=S)–NH2]-propanone triple systems (M=Ni, Cu) into corresponding metal(II) hexacyanoferrate(II) gelatin-immobilized matrix systems under contact with aqueous-alkaline (pH ∼ 12) solutions containing ethanedithioamide and propanone have been studied. Formation of supramolecular macrotetracyclic compounds of Ni(II) and Cu(II) with 2,7,7,9,14,14-hexamethyl-3,6,10,13-tetraazacyclotetradecadien-2,9-tetrathione-4,5,11,12 containing original “kernel” (metal complex) and “shell” surrounding this “kernel”, of polypeptide chains of the gelatin molecules, occurs under such specific conditions.

Gelatin-immobilized metal complexes: synthesis and applications

Formation of p-, d- and f-metal complex gelatin-immobilized matrix systems using reactions of electrophilic, nucleophilic substitution and template synthesis, and employment of these materials in photographic processes, in spectroscopy and for absorption of metal ions, have been summarized and discussed. The review covers the period 1990–2005.

Lead(II) Sulfide. Synthesis in Lead(II) Tetraoxophosphate(V) Gelatin-immobilized Matrix Implantates and Sorption Activity Toward Silver(I) Ions

Processes that occur in lead(II) tetraoxophosphate(V) gelatin-immobilized matrix systems on their contact with aqueous solutions containing the sulfide anion S2- were studied. As a result of this contact, lead(II) sulfide is formed. The sorption activity of the resulting metal sulfide gelatin-immobilized matrix systems with respect to Ag(I) ions is associated with substitution of Pb(II) by Ag(I) ions.

Mild template synthesis of (2,7-dithio-3,6-diazaoctadien-3,5-dithioamide-1,8)nickel(II) and (2,7-dithio-3,6-diazaoctadien-3,5-dithioamide-1,8)copper(II) in the Ni2[Fe(CN)6]- and Cu2[Fe(CN)6]–gelatin-immobilized matrix systems

The complexing processes leading under specific conditions to nickel(II)- or copper(II)hexacyanoferrate(II) gelatin-immobilized matrix systems in contact with aqueous–alkaline solutions (pH∼12) containing dithiooxamide and glyoxal, have been studied. It has been shown that template synthesis with formation of macrocyclic coordination compounds-(2,7-dithio-3,6-diazaoctadien-3,5-dithioamide-1,8) nickel(II) and (2,7-dithio-3,6-diazaoctadien-3,5-dithioamide-1,8)copper(II) takes place. In addition, dithiooxamide and glyoxal act as ligand synthons in this process.

Soft template synthesis in copper(II)–dithiooxamide–methanal, copper(II)–dithiooxamide–ethanal and copper(II)–dithiooxamide–propanone triple systems in a copper(II)hexacyanoferrate(II) gelatin-immobilized matrix

Novel complexing processes in the CuII–dithiooxamide–methanal, CuII–dithiooxamide–ethanal and CuII–dithiooxamide–propanone triple systems proceeding under specific conditions, to copper(II)hexacyanoferrate(II) gelatin-immobilized matrix systems in contact with aqueous-alkaline (pH ∼ 12) solutions containing dithiooxamide and methanal, ethanal or propanone, have been studied. It has been shown that template synthesis leading to the formation of macrocyclic coordination compounds (2,8-dithio-3,7-diaza-5-oxanonandithioamide-1,9)copper(II), (2,8-dithio-3,7-diaza-4,6-dimethyl-5-oxanonandithio-amide-1,9)copper(II) and (4,4′,6-trimethyl-2,8-dithio-3,7-diazanonen-6-dithioamide-1,9)copper(II), respectively, takes place under such conditions. Dithiooxamide, methanal, ethanal and propanone act as ligand synthons in these processes.

Soft template synthesis of (2,8-dithio-3,7-diaza-5-oxanonandithioamide-1,9) nickel(II) and (2,7-dithio-3,6-diazaoctadien-3,5-dithioamide-1,8)nickel(II) using a nickel(II)hexacyanoferrate(II) gelatin-immobilized matrix

Complexing processes leading under specific conditions to nickel(II)hexacyanoferrate(II) gelatin-immobilized matrix systems in contact with aqueous-alkaline solutions (pH ∼ 12) containing dithiooxamide and formaldehyde or glyoxal, have been studied. It has been shown that template synthesis of macrocyclic co-ordination compounds, (2,8-dithio-3,7-diaza-5-oxanonandithioamide-1,9)nickel(II) and (2,7-dithio-3,6-diazaoctadien-3,5-dithioamide-1,8)nickel(II), occurs. Dithiooxamide, formaldehyde and glyoxal act as ligand synthons in this process.

Complexing of nickel(II) with 8-mercaptoquinoline and of its 5-derivatives in nickel(II)hexacyanoferrate(II) gelatin-immobilized matrix systems

Complexing processes in systems containing NiII and 8-mercaptoquinoline or its derivatives (5-chloro-, 5-bromo-, 5-phenyl, 5-thiomethyl-8-mercaptoquinoline and 5,8-dimercaptoquinoline) take place in the nick- el(II)hexacyanoferrate(II) gelatin-immobilized matrix (GIM) in contact with an aqueous solution of the corresponding ligand. Under the conditions specified, in the NiII-8-mercaptoquinoline, NiII-5-chloro-8-mer captoquinoline,NiII-5-bromo-8-mercaptoquinoline, NiII-5-phenyl-8-mercaptoquinoline and NiII-5-thiomethyl-8-mercaptoquinoline systems, one water-insoluble complex of NiB2 composition (B− is a singly deprotonated ligand) is formed. In the NiII-5,8-dimercaptoquinoline system, two insoluble complexes, monomeric Ni(HB)2 and polymeric [Ni2B2(H2O)2]n (HB− is the singly, and B2− the doubly deprotonated form of the ligands) are generated. Upon complexing in solution or the solid phase, the formation of only one complex is observed in each of systems cited.

Complexing between copper(II) and bulky substituted 3-benzoyl thioureas in copper(II) hexacyanoferrate(II) gelatin-immobilized matrix systems

A novel route to complexes of CuII with various bulky substituted 3-benzoylthioureas: [(1-(2-hydroxy)phenyl-, 1-(4-hydroxy)phenyl-, 1,1-dibenzyl-, 1-methyl-1-phenyl-, 1-N-pentamethylene-] and 1-N-3-oxatetramethylene-3-benzoylthiourea, complexed to a CuII hexacyanoferrate- (II) gelatin-immobilized matrix in contact with aqueous alkali (pH 12.0) solutions of the ligands indicated, has been developed. Under the conditions specified, coordination of each ligand is preceded by decomposition of CuII-hexacyanoferrate(II) to give polymeric copper(II) hydroxide under the influence of OH− ions. With CuII-1-(4-hydroxy)phenyl-3-benzoylthiourea, three different water-insoluble coordination compounds are formed; in the other CuII-ligand systems, two types of complexes are formed, whereas complexing in solution or solid phase in these systems results, as a rule, in the formation of only one coordination compound. In systems such as CuII-1-naphthyl-3-benzoylthiourea, CuII-1-(4-hydroxy-3,5-di-t-butyl)benzyl-3-benzoylthiourea and CuII-1-(4-hydroxy-3,5-di-t-butyl) phenethyl-3-benzoylthiourea, complexing in CuII hexacyanoferrate(II) gelatin-immobilized matrices (GIM) is not observed.

Novel coordination compounds of nickel(II) and copper(II) with N,Nprime-diphenylthiooxamide; formation of complexed metalhexacyanoferrate(II) gelatin-immobilized matrix systems

A novel route to complexes of NiII and CuII with N,Nprime-diphenylthiooxamide, namely complexing in a NiII or CuII hexacyanoferrate(II) gelatin-immobilized matrix in contact with an aqueous solution of the N,Nprime-diphenylthiooxamide, has been studied. Under these specific conditions, in the NiII system, four different coordination compounds are formed, three of which are insoluble in H2O; in the CuII system, only one insoluble complex is formed. When complexation is carried out in solution or the solid phase, formation of only one complex is observed in each of systems studied.