Science China-Chemistry
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2015
·Vol. 59
·期 1
·114-121
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IF 1.695
Zhao Wenping,Jin Yu,Zhang Wen
Two phase transition compounds, diethylammonium 1,5-naphthalenedisulfonate (1) and cyclohexylammonium 1,5-naphthalenedisulfonate (2), were screened from a series of organic salts based on 1,5-naphthalenedisulfonate. The phase transition behaviors were studied by differential scanning calorimetry, single-crystal X-ray analysis and dielectric measurements. Compounds 1 and 2 undergo phase transitions at about 202 and 148 K, respectively, accompanied by distinct dielectric changes. The origin of the phase transitions was ascribed to motional changes of the cations in the crystal lattices.
研究领域:
材料科学
·
化学
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DOI
高影响因子
EUROPEAN JOURNAL OF ORGANIC CHEMISTRY
·
2015
·Vol. 2015
·期 31
·6806-6810
·
IF 3.065
Li Liu,Yuhang Yao,Xuefang Zhang,Ce Hao
Graphical A highly ordered 3D framework from 1,5-naphthalenedisulfonate (1,5-NDS) and cucurbit[6]uril (CB[6]) is synthesized, wherein the 1,5-NDS anions act as linkers to connect the CB[6] units together through C–H ··· O H-bonds. The fluorescence wavelength of the assembly structure is blueshifted relative to that of 1,5-NDS and the fluorescence intensity is decreased, which are ascribed to the formed H-bonds. A highly ordered 3D framework from 1,5-naphthalenedisulfonate (1,5-NDS) and cucurbit[6]uril was synthesized and structurally determined by single-crystal X-ray diffraction analysis. The crystal structure demonstrates that the 1,5-NDS anions act as linkers to connect the cucurbit[6]uril units together through C–H ··· O hydrogen bonds between the 1,5-NDS anions and cucurbit[6]uril. Furthermore, with 1,5-NDS as the fluorophore, the fluorescence properties of the corresponding assembly structure were investigated in the solid state. Relative to that observed for 1,5-NDS, the assembly exhibited a blueshift in the fluorescence wavelength from λ = 406 to 340 nm along with decreased fluorescence intensity. Theoretical calculations were in good agreement with the experimental results and disclosed that the fluorescence mechanism of the assembly structure could be ascribed to the hydrogen bonds formed between the 1,5-NDS anion and cucurbit[6]uril.
研究领域:
化学
·
材料科学
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产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2024
·
IF 8.4
Wenmin Li,Tingting Xu,Fangmeng Sheng,Yue Wang,Yifan Li,Yuan Xia,Bin Wu,Xingya Li,Tongwen Xu
The selective separation of monovalent ions remains a challenge because of the similar sub-nanometer sizes. Metal-organic frameworks (MOFs) are promising candidate membranes for ion selective separation based on the angstrom sized windows for size sieving. Here, to further enhance the monovalent ion selectivity , 1, 5-naphthalenedisulfonic acid tetrahydrate (NTDS) molecules with sulfonate groups are incorporated to offer a binding affinity, generating a UiO-66@NTDS membrane via the window-cavity structure confinement. In addition to the size sieving effect, the charge and affinity interaction can compensate the energy loss induced by the ion dehydration. Thus, the UiO-66@NTDS membranes exhibit elevated separation performance compared to the original UiO-66 membranes under the concentration gradient driven, accompanied by high monovalent cation permeation rates (i.e., 0.3–0.7 mol m −2 h −1 ) and mono-/divalent cation selectivities (i.e., ∼73 for K + /Mg 2+ , ∼57 for Na + /Mg 2+ , and ∼46 for Li + /Mg 2+ ). This work provides guidelines for the development of efficient ion-selective MOF membranes via the combination of size sieving and interaction attraction.
研究领域:
材料科学
·
化学工程
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Qiang Li,Yongyi He,Tingfang Tian,Hu Liu
NiOx is an inorganic hole layer that is widely used in perovskite light-emitting diodes (PeLEDs). However, direct interfacial contact with the perovskite film induces severe photoluminescence quenching, and buried interface defects critically impede the PeLEDs from achieving excellent performance. In this paper, S = O and Na+ are engineered to form coordination bonds and ionic bonds with defect sites at the buried interface of the perovskite film by providing lone pair electrons and Coulomb force to reduce the nonradiative recombination loss. The effects of different sodium naphthalene disulfonates on the passivation of perovskite films and the performance of PeLEDs were studied. The results show that the perovskite film prepared on the sodium 2,7-naphthalene disulfonate (DS2–7NA) substrate achieves excellent passivation, effectively avoiding direct contact with NiOx. Consequently, the green emission Quasi-2D PeLEDs exhibit an external quantum efficiency (EQE) exceeding 10%, a maximum brightness of approximately 6000 cd m–2, and an extended operational stability of 181.9 min under external environmental conditions.
研究领域:
材料科学
·
光电子学
·
纳米技术
·
固体物理
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产品关联
DOI
PubMed
高影响因子
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