A novel soluble, reactive ladder-like polysilsesquioxane (L) with lateral bromophenyl groups was synthesized successfully by stepwise coupling polymerization (SCP) method including preaminolysis, hydrolysis and polyco...A novel soluble, reactive ladder-like polysilsesquioxane (L) with lateral bromophenyl groups was synthesized successfully by stepwise coupling polymerization (SCP) method including preaminolysis, hydrolysis and polycondensation steps. The monomer 3-trichlorosilylpropoxy-4-bromobenzene (M) was first prepared via hydrosilylation reaction catalyzed by dicyclopentadienylplatinum dichloride (Cp2PtCl2). The title polymer (L) was characterized by 1H-NMR, 29Si-NMR, FTIR, X-ray diffraction (XRD), DSC and vapor pressure osmometry (VPO). The experimental results indicate that the polymer (L) possesses a typical ladder-like structure.展开更多
A novel double ladder-like cadmium coordination polymer with isophthalate as bridging ligands and imidazole as non-chelating capping ligands was obtained by a hydrothermal reaction. The crystal is of triclinic, space ...A novel double ladder-like cadmium coordination polymer with isophthalate as bridging ligands and imidazole as non-chelating capping ligands was obtained by a hydrothermal reaction. The crystal is of triclinic, space group P1 with a = 10.266（2）, b = 11.573（2）, c = 12.651（3） A, α = 89.95（3）, β= 74.64（3）,γ = 68.54（3）°, C50H44Cd4N12O18, Mr = 1550.57, V= 1341.1（5）A3, Dc = 1.920 g/cm3, F（000） = 764, p = 1.651 cm-1 and Z = 1. The final refinement gave R = 0.0342 and wR = 0.0738 for 5925 observed reflections with I 〉 2σ（I）. The crystal structure involves two different ladder-like chains, which are further connected to form a ladder-like double chain architecture via hydrogen bonding interactions, extending along the b axis. The weak interactions including hydrogen bonds and π-π staking interactions contribute to the alignment of the complex in the crystalline state.展开更多
Redox reaction of a mixture of CuC12·2H2O, HaPO3 and dpatrz （3,5-dipropyl- 4-amino-1,2,4-triazole） at room temperature yields one new compound, [Cu（1）（/.t2-dpatrz）aCu（1）CI2], with two independent cis- and...Redox reaction of a mixture of CuC12·2H2O, HaPO3 and dpatrz （3,5-dipropyl- 4-amino-1,2,4-triazole） at room temperature yields one new compound, [Cu（1）（/.t2-dpatrz）aCu（1）CI2], with two independent cis- and trans-propyl side chain molecules. Compound 1 crystallizes in monoclinic, space group P21/c with a = 7.474（1）, b = 17.807（1）, c = 18.851（1） A, β = 108.32（1）°, V = 2381.7（2） A3, Z = 4, C16H32CI2Cu2Ns, Mr = 534.48, Dc = 1.491 g.cm-3,μ = 2.03 mm-1, F（000） = 1104, GOOF = 1.050, the final R = 0.0445 and wR = 0.1162 for 3162 observed reflections （I 〉 2σ（I））. Compound 1 shows discrete dimeric structures （A and B） containing inversion centers and the Cu（l） ions are coordinated in triangle geometries. The isomers are connected by N-H…CI hydrogen bonds, chains with graph-set C（7） and rings R22（14） and C-H..＇Jr interactions into stair-step chains （Tapes A and B） running parallel to the [01-1] direction. The N-H…C1 hydrogen bonds result in chain and cyclic structures with graph-sets C22（17） and R34（18） linking tapes A and B to form two-dimensional networks along the [031] direction. Packing of crystal 1 is stabilized by rings R34（18） and weak C-H…C1 hydrogen bonds parallel to the [01-2] direction. Bond valence sum （BVS） and UV-Vis absorption spectra support the existence of Cu（I） ions. Compound 1 exhibits extensive green blue phosphorescence in the solid state at room temperature.展开更多
Ladder-like polydecylsilsesquioxane (LPDS) was synthesized by a preamminolysis reaction ofdecyltrichlorosilane with ethylene diamine, followed by hydrolysis and polycondensation reaction. LPDS issoluble in a nonpolar ...Ladder-like polydecylsilsesquioxane (LPDS) was synthesized by a preamminolysis reaction ofdecyltrichlorosilane with ethylene diamine, followed by hydrolysis and polycondensation reaction. LPDS issoluble in a nonpolar solvent such as heptane and insoluble in a high polar solvent such as methanol. It wascharaterized by IR, ~1H-NMR, ^(29)Si-NMR, GPC and X-ray diffraction.展开更多
A ladder-like structure compound formed by cadmium (II) and anionic nitronyl nitroxide, [Cd2(NITpBA)4(H2O)4] (where NITpBA = 2-(4-carboxyphenyl)4,4,5,5-tetramethyl-4,5-dihydro-imidazol-1-oxyl-3-oxide), has been synthe...A ladder-like structure compound formed by cadmium (II) and anionic nitronyl nitroxide, [Cd2(NITpBA)4(H2O)4] (where NITpBA = 2-(4-carboxyphenyl)4,4,5,5-tetramethyl-4,5-dihydro-imidazol-1-oxyl-3-oxide), has been synthesized and characterized. X-ray analysis reveals that the compound 1 crystallizes in the monoclinic P21/c (No. 14) space group, and [Cd2(NITpBA)4(H2O)4] units are linked into infinite chains by radical bridging ligands.展开更多
Nowadays organosilicon luminescent materials are of increasing interest due to the variety of their synthetic or modification techniques and application fields.Ladder polyphenylsilsesquioxanes(L-PPSQ)are a unique clas...Nowadays organosilicon luminescent materials are of increasing interest due to the variety of their synthetic or modification techniques and application fields.Ladder polyphenylsilsesquioxanes(L-PPSQ)are a unique class of organosilicon polymers,which can be ideal matrices for the luminescent composites due to their high thermal stability,optical transparency and mechanical strength.In this work,new mechanically strong,heat-resistant,transparent and sensitive to ammonia vapor luminescent composite films based on L-PPSQ have been obtained.As the source of Europium ions oligophenyleuropiumsiloxane was used,demonstrating perfect compatibility to the matrix due to the similar nature.To improve luminescent properties of the films,new organosilicon ligands were introduced into the composites and their influence on the properties of the materials was studied.Valuable properties of described composites may allow their further application as multifunctional coatings.展开更多
基金This work was supported by the National Natural Science Foundation of China (No. 20174047, 20204016, 50273043) andDow Corning Corporation, USA.
文摘A novel soluble, reactive ladder-like polysilsesquioxane (L) with lateral bromophenyl groups was synthesized successfully by stepwise coupling polymerization (SCP) method including preaminolysis, hydrolysis and polycondensation steps. The monomer 3-trichlorosilylpropoxy-4-bromobenzene (M) was first prepared via hydrosilylation reaction catalyzed by dicyclopentadienylplatinum dichloride (Cp2PtCl2). The title polymer (L) was characterized by 1H-NMR, 29Si-NMR, FTIR, X-ray diffraction (XRD), DSC and vapor pressure osmometry (VPO). The experimental results indicate that the polymer (L) possesses a typical ladder-like structure.
基金supported by the Natural Science Foundation of Shagdong Province (No. Y2007F68)the Excellent Young Scholars Research Fund of Shanghai (No. YQ307007)
文摘A novel double ladder-like cadmium coordination polymer with isophthalate as bridging ligands and imidazole as non-chelating capping ligands was obtained by a hydrothermal reaction. The crystal is of triclinic, space group P1 with a = 10.266（2）, b = 11.573（2）, c = 12.651（3） A, α = 89.95（3）, β= 74.64（3）,γ = 68.54（3）°, C50H44Cd4N12O18, Mr = 1550.57, V= 1341.1（5）A3, Dc = 1.920 g/cm3, F（000） = 764, p = 1.651 cm-1 and Z = 1. The final refinement gave R = 0.0342 and wR = 0.0738 for 5925 observed reflections with I 〉 2σ（I）. The crystal structure involves two different ladder-like chains, which are further connected to form a ladder-like double chain architecture via hydrogen bonding interactions, extending along the b axis. The weak interactions including hydrogen bonds and π-π staking interactions contribute to the alignment of the complex in the crystalline state.
基金Supported by the National Natural Science Foundation of China(Nos.21171109&21271121)SRFDP(Nos.20111401110002&20121401110005)Shanxi Scholarship Council of China(2012-004&2013-026)
文摘Redox reaction of a mixture of CuC12·2H2O, HaPO3 and dpatrz （3,5-dipropyl- 4-amino-1,2,4-triazole） at room temperature yields one new compound, [Cu（1）（/.t2-dpatrz）aCu（1）CI2], with two independent cis- and trans-propyl side chain molecules. Compound 1 crystallizes in monoclinic, space group P21/c with a = 7.474（1）, b = 17.807（1）, c = 18.851（1） A, β = 108.32（1）°, V = 2381.7（2） A3, Z = 4, C16H32CI2Cu2Ns, Mr = 534.48, Dc = 1.491 g.cm-3,μ = 2.03 mm-1, F（000） = 1104, GOOF = 1.050, the final R = 0.0445 and wR = 0.1162 for 3162 observed reflections （I 〉 2σ（I））. Compound 1 shows discrete dimeric structures （A and B） containing inversion centers and the Cu（l） ions are coordinated in triangle geometries. The isomers are connected by N-H…CI hydrogen bonds, chains with graph-set C（7） and rings R22（14） and C-H..＇Jr interactions into stair-step chains （Tapes A and B） running parallel to the [01-1] direction. The N-H…C1 hydrogen bonds result in chain and cyclic structures with graph-sets C22（17） and R34（18） linking tapes A and B to form two-dimensional networks along the [031] direction. Packing of crystal 1 is stabilized by rings R34（18） and weak C-H…C1 hydrogen bonds parallel to the [01-2] direction. Bond valence sum （BVS） and UV-Vis absorption spectra support the existence of Cu（I） ions. Compound 1 exhibits extensive green blue phosphorescence in the solid state at room temperature.
基金The project was supported by the National Natural Science Foundation of China (No 59483001).
文摘Ladder-like polydecylsilsesquioxane (LPDS) was synthesized by a preamminolysis reaction ofdecyltrichlorosilane with ethylene diamine, followed by hydrolysis and polycondensation reaction. LPDS issoluble in a nonpolar solvent such as heptane and insoluble in a high polar solvent such as methanol. It wascharaterized by IR, ~1H-NMR, ^(29)Si-NMR, GPC and X-ray diffraction.
文摘A ladder-like structure compound formed by cadmium (II) and anionic nitronyl nitroxide, [Cd2(NITpBA)4(H2O)4] (where NITpBA = 2-(4-carboxyphenyl)4,4,5,5-tetramethyl-4,5-dihydro-imidazol-1-oxyl-3-oxide), has been synthesized and characterized. X-ray analysis reveals that the compound 1 crystallizes in the monoclinic P21/c (No. 14) space group, and [Cd2(NITpBA)4(H2O)4] units are linked into infinite chains by radical bridging ligands.
基金financially supported by the Russian Science Foundation(No.23-79-10256)。
文摘Nowadays organosilicon luminescent materials are of increasing interest due to the variety of their synthetic or modification techniques and application fields.Ladder polyphenylsilsesquioxanes(L-PPSQ)are a unique class of organosilicon polymers,which can be ideal matrices for the luminescent composites due to their high thermal stability,optical transparency and mechanical strength.In this work,new mechanically strong,heat-resistant,transparent and sensitive to ammonia vapor luminescent composite films based on L-PPSQ have been obtained.As the source of Europium ions oligophenyleuropiumsiloxane was used,demonstrating perfect compatibility to the matrix due to the similar nature.To improve luminescent properties of the films,new organosilicon ligands were introduced into the composites and their influence on the properties of the materials was studied.Valuable properties of described composites may allow their further application as multifunctional coatings.
