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Jennifer A Zampese - One of the best experts on this subject based on the ideXlab platform.
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4 pyrimidin 5 yl and 4 2 methylpyrimidin 5 yl 4 2 6 4 terpyridines selective coordination to zinc ii through the 4 2 6 4 terpyridine domain
Polyhedron, 2014Co-Authors: Maximilian Y Klein, Edwin C Constable, Catherine E Housecroft, Jennifer A ZampeseAbstract:Abstract The preparation and characterization of the compounds 4′-(pyrimidin-5-yl)-4,2′:6′,4″-terpyridine (3) and 4′-(2-methylpyrimidin-5-yl)-4,2′:6′,4″-terpyridine (4) are described. Preferential coordination through the terminal pyridine donors of the tpy domain is observed when 3 and 4 are treated with ZnCl2 or ZnI2. The 1-dimensional coordination polymers [{ZnCl2(3)}n], [{ZnI2(3)}n] and [{ZnI2(4)·MeOH}n] have been structurally characterized by single crystal X-ray crystallography. [{ZnI2(3)}n] is helical and crystallizes with both P- and M-helices in the lattice; the packing of P- and M-chains involves discrete tetradecker π-stacking domains involving 4,2′:6′,4″-tpy units. The introduction of the 2-methyl substituent on going from 3 to 4 has only a small effect on the structure of [{ZnI2(L)}n] (L = 3 or 4). The two coordination polymer chains assemble through face-to-face π-interactions into sheets with the pyrimidin-5-yl units projecting outwards. The presence of the 2-methyl substituents in 4 forces the sheets in [{ZnI2(4)·MeOH}n] further apart compared to those in [{ZnI2(3)}n], leading to the accommodation of MeOH molecules in cavities between the sheets.
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2d 2d parallel interpenetration of 4 4 sheets constructed from a ditopic bis 4 2 6 4 terpyridine
CrystEngComm, 2014Co-Authors: Edwin C Constable, Catherine E Housecroft, Srboljub Vujovic, Jennifer A ZampeseAbstract:The ditopic ligand 1,4-bis(n-octyloxy)-2,5-bis(4,2′:6′,4′′-terpyridin-4′-yl)benzene reacts with ZnCl2 to give 2-dimensional (4,4) nets with a corrugated topology facilitating interpenetration in a 2D → 2D parallel manner.
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coordination polymers with 4 4 anthracen 9 yl phenyl and 4 4 naphthalen 1 yl phenyl 4 2 6 4 terpyridines mono di and heptazinc ii nodes
Polyhedron, 2013Co-Authors: Edwin C Constable, Catherine E Housecroft, Srboljub Vujovic, Jonas Schonle, Jennifer A ZampeseAbstract:Abstract Reactions of 4′-(4-(anthracen-9-yl)phenyl)-4,2′:6′,4″-terpyridine (2) with zinc(II) acetate lead to helical one-dimensional polymers [{Zn(OAc)2(2)}n] which crystallize either as racemates or the homochiral polymer containing mononuclear {Zn(OAc)2} nodes linked by divergent 4,2′:6′,4″-terpyridine ligands. In contrast, when 4′-(4-(naphthalen-1-yl)phenyl)-4,2′:6′,4″-terpyridine (3) reacts with zinc(II) acetate, a one-dimensional coordination polymer [{Zn2(μ-OAc)4(3)}n] in which the metal nodes are dinuclear {Zn2(μ-OAc)4} units is formed. This mimics the assembly formed when the ligand is 4′-(4-biphenylyl)-4,2′:6′,4″-terpyridine (1). In addition, crystals of [{Zn7(μ-OAc)10(μ4-O)2(3)}n] were isolated and structural determination reveals a one-dimensional coordination polymer in which each ligand 3 bridges between {Zn7(μ-OAc)10(μ4-O)2} clusters. Ligands 2 and 3 are both emissive in solution and in the solid state. The emission spectra of ethanol solutions of [{Zn(OAc)2(2)}n] and [{Zn2(μ-OAc)4(3)}n] are consistent with dissociation of the complexes, the emission maxima mimicking those of the free ligands. The emission of 2 in the solid state is essentially quenched upon complexation with zinc(II) acetate, whereas on going from 3 to [{Zn2(μ-OAc)4(3)}n], a red-shift is observed (416 to 434 nm) without change in the quantum yield (ca. 1.6%).
Luigino Troisi - One of the best experts on this subject based on the ideXlab platform.
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efficient synthesis of 5 6 dihydro 8h 1 2 4 thiadiazino 6 5 4 de phenanthridine 4 4 dioxide and 5 6 dihydro 8h 1 2 4 thiadiazino 6 5 4 ij thieno 2 3 c quinoline 4 4 dioxide
ChemInform, 2012Co-Authors: Umberto Maria Battisti, Marina Maria Carrozzo, Giuseppe Cannazza, Daniela Braghiroli, Carlo Parenti, Livio Brasili, Cinzia Citti, Luigino TroisiAbstract:The three-step synthesis of the title compounds is based on formation of key intermediates (III) and (VIII) from substrate (I) and boronic acids via Suzuki coupling and imine formation.
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efficient synthesis of 5 6 dihydro 8h 1 2 4 thiadiazino 6 5 4 de phenanthridine 4 4 dioxide and 5 6 dihydro 8h 1 2 4 thiadiazino 6 5 4 ij thieno 2 3 c quinoline 4 4 dioxide
Tetrahedron Letters, 2012Co-Authors: Umberto Maria Battisti, Marina Maria Carrozzo, Giuseppe Cannazza, Daniela Braghiroli, Carlo Parenti, Livio Brasili, Cinzia Citti, Luigino TroisiAbstract:A new efficient and versatile synthesis to obtain different substituted 5,6-dihydro-8H-[1,2,4]thiadiazino[6,5,4-de]phenanthridine 4,4-dioxide and 5,6-dihydro-8H-[1,2,4]-thiadiazino[6,5,4-ij]thieno[2,3-c]quinolone 4,4-dioxide was developed. The four cyclic systems are achieved by a three-step synthesis proceeding under mild conditions in high yields.
Edwin C Constable - One of the best experts on this subject based on the ideXlab platform.
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4 pyrimidin 5 yl and 4 2 methylpyrimidin 5 yl 4 2 6 4 terpyridines selective coordination to zinc ii through the 4 2 6 4 terpyridine domain
Polyhedron, 2014Co-Authors: Maximilian Y Klein, Edwin C Constable, Catherine E Housecroft, Jennifer A ZampeseAbstract:Abstract The preparation and characterization of the compounds 4′-(pyrimidin-5-yl)-4,2′:6′,4″-terpyridine (3) and 4′-(2-methylpyrimidin-5-yl)-4,2′:6′,4″-terpyridine (4) are described. Preferential coordination through the terminal pyridine donors of the tpy domain is observed when 3 and 4 are treated with ZnCl2 or ZnI2. The 1-dimensional coordination polymers [{ZnCl2(3)}n], [{ZnI2(3)}n] and [{ZnI2(4)·MeOH}n] have been structurally characterized by single crystal X-ray crystallography. [{ZnI2(3)}n] is helical and crystallizes with both P- and M-helices in the lattice; the packing of P- and M-chains involves discrete tetradecker π-stacking domains involving 4,2′:6′,4″-tpy units. The introduction of the 2-methyl substituent on going from 3 to 4 has only a small effect on the structure of [{ZnI2(L)}n] (L = 3 or 4). The two coordination polymer chains assemble through face-to-face π-interactions into sheets with the pyrimidin-5-yl units projecting outwards. The presence of the 2-methyl substituents in 4 forces the sheets in [{ZnI2(4)·MeOH}n] further apart compared to those in [{ZnI2(3)}n], leading to the accommodation of MeOH molecules in cavities between the sheets.
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2d 2d parallel interpenetration of 4 4 sheets constructed from a ditopic bis 4 2 6 4 terpyridine
CrystEngComm, 2014Co-Authors: Edwin C Constable, Catherine E Housecroft, Srboljub Vujovic, Jennifer A ZampeseAbstract:The ditopic ligand 1,4-bis(n-octyloxy)-2,5-bis(4,2′:6′,4′′-terpyridin-4′-yl)benzene reacts with ZnCl2 to give 2-dimensional (4,4) nets with a corrugated topology facilitating interpenetration in a 2D → 2D parallel manner.
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coordination polymers with 4 4 anthracen 9 yl phenyl and 4 4 naphthalen 1 yl phenyl 4 2 6 4 terpyridines mono di and heptazinc ii nodes
Polyhedron, 2013Co-Authors: Edwin C Constable, Catherine E Housecroft, Srboljub Vujovic, Jonas Schonle, Jennifer A ZampeseAbstract:Abstract Reactions of 4′-(4-(anthracen-9-yl)phenyl)-4,2′:6′,4″-terpyridine (2) with zinc(II) acetate lead to helical one-dimensional polymers [{Zn(OAc)2(2)}n] which crystallize either as racemates or the homochiral polymer containing mononuclear {Zn(OAc)2} nodes linked by divergent 4,2′:6′,4″-terpyridine ligands. In contrast, when 4′-(4-(naphthalen-1-yl)phenyl)-4,2′:6′,4″-terpyridine (3) reacts with zinc(II) acetate, a one-dimensional coordination polymer [{Zn2(μ-OAc)4(3)}n] in which the metal nodes are dinuclear {Zn2(μ-OAc)4} units is formed. This mimics the assembly formed when the ligand is 4′-(4-biphenylyl)-4,2′:6′,4″-terpyridine (1). In addition, crystals of [{Zn7(μ-OAc)10(μ4-O)2(3)}n] were isolated and structural determination reveals a one-dimensional coordination polymer in which each ligand 3 bridges between {Zn7(μ-OAc)10(μ4-O)2} clusters. Ligands 2 and 3 are both emissive in solution and in the solid state. The emission spectra of ethanol solutions of [{Zn(OAc)2(2)}n] and [{Zn2(μ-OAc)4(3)}n] are consistent with dissociation of the complexes, the emission maxima mimicking those of the free ligands. The emission of 2 in the solid state is essentially quenched upon complexation with zinc(II) acetate, whereas on going from 3 to [{Zn2(μ-OAc)4(3)}n], a red-shift is observed (416 to 434 nm) without change in the quantum yield (ca. 1.6%).
Umberto Maria Battisti - One of the best experts on this subject based on the ideXlab platform.
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efficient synthesis of 5 6 dihydro 8h 1 2 4 thiadiazino 6 5 4 de phenanthridine 4 4 dioxide and 5 6 dihydro 8h 1 2 4 thiadiazino 6 5 4 ij thieno 2 3 c quinoline 4 4 dioxide
ChemInform, 2012Co-Authors: Umberto Maria Battisti, Marina Maria Carrozzo, Giuseppe Cannazza, Daniela Braghiroli, Carlo Parenti, Livio Brasili, Cinzia Citti, Luigino TroisiAbstract:The three-step synthesis of the title compounds is based on formation of key intermediates (III) and (VIII) from substrate (I) and boronic acids via Suzuki coupling and imine formation.
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efficient synthesis of 5 6 dihydro 8h 1 2 4 thiadiazino 6 5 4 de phenanthridine 4 4 dioxide and 5 6 dihydro 8h 1 2 4 thiadiazino 6 5 4 ij thieno 2 3 c quinoline 4 4 dioxide
Tetrahedron Letters, 2012Co-Authors: Umberto Maria Battisti, Marina Maria Carrozzo, Giuseppe Cannazza, Daniela Braghiroli, Carlo Parenti, Livio Brasili, Cinzia Citti, Luigino TroisiAbstract:A new efficient and versatile synthesis to obtain different substituted 5,6-dihydro-8H-[1,2,4]thiadiazino[6,5,4-de]phenanthridine 4,4-dioxide and 5,6-dihydro-8H-[1,2,4]-thiadiazino[6,5,4-ij]thieno[2,3-c]quinolone 4,4-dioxide was developed. The four cyclic systems are achieved by a three-step synthesis proceeding under mild conditions in high yields.
Catherine E Housecroft - One of the best experts on this subject based on the ideXlab platform.
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4 pyrimidin 5 yl and 4 2 methylpyrimidin 5 yl 4 2 6 4 terpyridines selective coordination to zinc ii through the 4 2 6 4 terpyridine domain
Polyhedron, 2014Co-Authors: Maximilian Y Klein, Edwin C Constable, Catherine E Housecroft, Jennifer A ZampeseAbstract:Abstract The preparation and characterization of the compounds 4′-(pyrimidin-5-yl)-4,2′:6′,4″-terpyridine (3) and 4′-(2-methylpyrimidin-5-yl)-4,2′:6′,4″-terpyridine (4) are described. Preferential coordination through the terminal pyridine donors of the tpy domain is observed when 3 and 4 are treated with ZnCl2 or ZnI2. The 1-dimensional coordination polymers [{ZnCl2(3)}n], [{ZnI2(3)}n] and [{ZnI2(4)·MeOH}n] have been structurally characterized by single crystal X-ray crystallography. [{ZnI2(3)}n] is helical and crystallizes with both P- and M-helices in the lattice; the packing of P- and M-chains involves discrete tetradecker π-stacking domains involving 4,2′:6′,4″-tpy units. The introduction of the 2-methyl substituent on going from 3 to 4 has only a small effect on the structure of [{ZnI2(L)}n] (L = 3 or 4). The two coordination polymer chains assemble through face-to-face π-interactions into sheets with the pyrimidin-5-yl units projecting outwards. The presence of the 2-methyl substituents in 4 forces the sheets in [{ZnI2(4)·MeOH}n] further apart compared to those in [{ZnI2(3)}n], leading to the accommodation of MeOH molecules in cavities between the sheets.
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2d 2d parallel interpenetration of 4 4 sheets constructed from a ditopic bis 4 2 6 4 terpyridine
CrystEngComm, 2014Co-Authors: Edwin C Constable, Catherine E Housecroft, Srboljub Vujovic, Jennifer A ZampeseAbstract:The ditopic ligand 1,4-bis(n-octyloxy)-2,5-bis(4,2′:6′,4′′-terpyridin-4′-yl)benzene reacts with ZnCl2 to give 2-dimensional (4,4) nets with a corrugated topology facilitating interpenetration in a 2D → 2D parallel manner.
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coordination polymers with 4 4 anthracen 9 yl phenyl and 4 4 naphthalen 1 yl phenyl 4 2 6 4 terpyridines mono di and heptazinc ii nodes
Polyhedron, 2013Co-Authors: Edwin C Constable, Catherine E Housecroft, Srboljub Vujovic, Jonas Schonle, Jennifer A ZampeseAbstract:Abstract Reactions of 4′-(4-(anthracen-9-yl)phenyl)-4,2′:6′,4″-terpyridine (2) with zinc(II) acetate lead to helical one-dimensional polymers [{Zn(OAc)2(2)}n] which crystallize either as racemates or the homochiral polymer containing mononuclear {Zn(OAc)2} nodes linked by divergent 4,2′:6′,4″-terpyridine ligands. In contrast, when 4′-(4-(naphthalen-1-yl)phenyl)-4,2′:6′,4″-terpyridine (3) reacts with zinc(II) acetate, a one-dimensional coordination polymer [{Zn2(μ-OAc)4(3)}n] in which the metal nodes are dinuclear {Zn2(μ-OAc)4} units is formed. This mimics the assembly formed when the ligand is 4′-(4-biphenylyl)-4,2′:6′,4″-terpyridine (1). In addition, crystals of [{Zn7(μ-OAc)10(μ4-O)2(3)}n] were isolated and structural determination reveals a one-dimensional coordination polymer in which each ligand 3 bridges between {Zn7(μ-OAc)10(μ4-O)2} clusters. Ligands 2 and 3 are both emissive in solution and in the solid state. The emission spectra of ethanol solutions of [{Zn(OAc)2(2)}n] and [{Zn2(μ-OAc)4(3)}n] are consistent with dissociation of the complexes, the emission maxima mimicking those of the free ligands. The emission of 2 in the solid state is essentially quenched upon complexation with zinc(II) acetate, whereas on going from 3 to [{Zn2(μ-OAc)4(3)}n], a red-shift is observed (416 to 434 nm) without change in the quantum yield (ca. 1.6%).
