Two new nonmetal borates, [（C2H10N2）]2[B14O20（OH）6] 1 and [C8H22N4][B5O6（OH）4]2 2, have been synthesized under mild conditions and characterized by single-crystal X-ray diffraction, FTIR, elemental analysis and ...Two new nonmetal borates, [（C2H10N2）]2[B14O20（OH）6] 1 and [C8H22N4][B5O6（OH）4]2 2, have been synthesized under mild conditions and characterized by single-crystal X-ray diffraction, FTIR, elemental analysis and thermogravimetric analysis. Crystal data for compound 1： triclinic, space group P^-1, a = 8.4979（17）, b = 8.8498（18）, c = 10.065（2）A^°, α = 95.01（3）, β = 96.99（3）, γ = 116.82（3）°, V= 661.8（3）A^°^3, Z= 1, Mr = 697.63, Dc = 1.751 g/cm^3,μ = 0.163 mm^-1, F（000） = 356, the final R = 0.0372 and wR = 0.0968 （I 〉 2σ（I））; and those for compound 2： monoclinic, space group P21/c, a = 9.1867（18）, b= 14.118（3）, c = 10.334（2）A^°, β = 91.48（3）°, V = 1339.8（5）A^°^3, Z = 2, Mr = 610.46, Dc = 1.513 g/cm^3,μ = 0.135 mm^-1, F（000） = 632, the final R = 0.0350 and wR = 0.0912 （I 〉 2σ（I））. For both 1 and 2, the anionic units are interlinked via O-H…O hydrogen bonds to form a 3D supramolecular network, while the protonated cations are located in the free space of the inorganic borate framework and interact with the anions by electrostatic attraction and extensive N-H…O hydrogen bonds.展开更多
Intelligent responsive devices are crucial for a variety of applications ranging from smart electronics to robotics.Electro-responsive cholesteric liquid crystals(CLC)have been widely applied in display panels,smart w...Intelligent responsive devices are crucial for a variety of applications ranging from smart electronics to robotics.Electro-responsive cholesteric liquid crystals(CLC)have been widely applied in display panels,smart windows,and so on.In this work,we realize the mechanical stimuli-triggered optical responses of the CLC by integrating it with a triboelectric nanogenerator(TENG),which converts the mechanical motion into alternating current electricity and then tunes the different optical responses of the CLC.When the voltage applied on the CLC is relatively low(15–40 V),the TENG drives the switching between the bistable planar state and focal conic state of the CLC,which shows potential applications in selfpowered smart windows or E-paper displays.When the voltage supplied by the TENG is larger than60 V,a self-powered optical switch is demonstrated by utilizing the transformation between focal conic state and instantons homeotropic state of the CLC.This triboelectric-optical responsive device consumes no extra electric power and suggests a great potential for future smart electronics.展开更多
基金supported by the Natural Science Foundation of Ningbo City (2007A610022) K. C. Wong Magna Fund in Ningbo University
文摘Two new nonmetal borates, [（C2H10N2）]2[B14O20（OH）6] 1 and [C8H22N4][B5O6（OH）4]2 2, have been synthesized under mild conditions and characterized by single-crystal X-ray diffraction, FTIR, elemental analysis and thermogravimetric analysis. Crystal data for compound 1： triclinic, space group P^-1, a = 8.4979（17）, b = 8.8498（18）, c = 10.065（2）A^°, α = 95.01（3）, β = 96.99（3）, γ = 116.82（3）°, V= 661.8（3）A^°^3, Z= 1, Mr = 697.63, Dc = 1.751 g/cm^3,μ = 0.163 mm^-1, F（000） = 356, the final R = 0.0372 and wR = 0.0968 （I 〉 2σ（I））; and those for compound 2： monoclinic, space group P21/c, a = 9.1867（18）, b= 14.118（3）, c = 10.334（2）A^°, β = 91.48（3）°, V = 1339.8（5）A^°^3, Z = 2, Mr = 610.46, Dc = 1.513 g/cm^3,μ = 0.135 mm^-1, F（000） = 632, the final R = 0.0350 and wR = 0.0912 （I 〉 2σ（I））. For both 1 and 2, the anionic units are interlinked via O-H…O hydrogen bonds to form a 3D supramolecular network, while the protonated cations are located in the free space of the inorganic borate framework and interact with the anions by electrostatic attraction and extensive N-H…O hydrogen bonds.
基金supported by the National Key Research and Development Program of China(2016YFA0202702)the Youth Innovation Promotion Association of CAS。
文摘Intelligent responsive devices are crucial for a variety of applications ranging from smart electronics to robotics.Electro-responsive cholesteric liquid crystals(CLC)have been widely applied in display panels,smart windows,and so on.In this work,we realize the mechanical stimuli-triggered optical responses of the CLC by integrating it with a triboelectric nanogenerator(TENG),which converts the mechanical motion into alternating current electricity and then tunes the different optical responses of the CLC.When the voltage applied on the CLC is relatively low(15–40 V),the TENG drives the switching between the bistable planar state and focal conic state of the CLC,which shows potential applications in selfpowered smart windows or E-paper displays.When the voltage supplied by the TENG is larger than60 V,a self-powered optical switch is demonstrated by utilizing the transformation between focal conic state and instantons homeotropic state of the CLC.This triboelectric-optical responsive device consumes no extra electric power and suggests a great potential for future smart electronics.
