Hainan is an island province in south China with a high frequency of unconventional emergencies due to its special geographic location and national military defense role.Given the limited transportation route from Hai...Hainan is an island province in south China with a high frequency of unconventional emergencies due to its special geographic location and national military defense role.Given the limited transportation route from Hainan to the outside world,self-rescue is more important to Hainan Province than other provinces in China and it is therefore imperative to establish an independent, scientific as well as efficient provincal disaster medical system in Hainan.The regulatory role for vulnerability analysis/assessment has been demonstrated in establisment of disaster medical system in varoius countries and or regions.In this paper,we attempt to describe/propose how to adopt vulnerability assessment through mathematical modeling of major biophysical social vulnerability factors to establish an independent,scientific,effieicnt and comprehensive provincial disaster medical system in Hainan.展开更多
The application of multifunctional materials in various fields such as electronics and signal processors has attracted massive attention. Herein, a new organic-inorganic hybrid material [Et_(3)NCH_(2)Cl]_(2)[MnBr_(4)]...The application of multifunctional materials in various fields such as electronics and signal processors has attracted massive attention. Herein, a new organic-inorganic hybrid material [Et_(3)NCH_(2)Cl]_(2)[MnBr_(4)](1) is reported, which contains two organic amines cations and one [MnBr_(4)] tetrahedral ion. Compound 1 has a dielectric anomaly signal at 338 K, which proves its thermodynamic phase transition. The single crystal measurements at 200 K and 380 K show that the phase transition of compound 1 is caused by the thermal vibration of organic amine cations in the lattice. Moreover, compound 1 shows yellow-green luminescence under UV light irradiation. The magnetism measurements indicate that compound 1 shows switchable magnetic properties. This organic–inorganic material is a multifunctional material with dielectric, optical, and magnetic synergetic switchable effects, which expands a new direction for designing multifunctional materials.展开更多
We report the unprecedented observation of reversible interface propagation in the switchable cooperative Fe(Ⅲ)spin crossover compound[Fe(3-EtO-salEen)_(2)]NO_(3),where 3-EtO-salEen is 3-ethoxy-N-ethyl-N-(2-aminoethy...We report the unprecedented observation of reversible interface propagation in the switchable cooperative Fe(Ⅲ)spin crossover compound[Fe(3-EtO-salEen)_(2)]NO_(3),where 3-EtO-salEen is 3-ethoxy-N-ethyl-N-(2-aminoethyl)salicylaldiminate.This complex exhibits a spin transition from low-spin to high-spin states,triggered by temperature around 345 K.Magnetic susceptibility measurements reveal an abrupt transition with a thermal hysteresis of 5 K.Differential scanning calorimetry confirms both endothermic(T_(on)=344.50 K and T_(max)=345.61 K,Δ_(trs)H°_(m)=12:05 kJ mol^(-1)andΔ_(trs)S°_(m)=34:98 J mol^(-1))and exothermic(T_(on)=344.40 K,T_(max)=345.49 K,Δ_(trs)H°_(m)=10:98 kJ mol^(-1)andΔ_(trs)S°_(m)=31:88 J mol^(-1))peaks corresponding to the spin transition temperatures.Cryogenic optical microscopy reveals rapid interface propagation,with velocities(v_(HS→LS)≃1672μm s^(−1)and v_(LS→HS)≃850μm s^(−1))significantly higher than those observed in traditional Fe(II)-based spin crossover materials.The high-speed propagation is attributed to the combined effect of the reduced volume change and lower elastic energy barriers associated with the transition in Fe(Ⅲ)systems and the high values of the transition temperatures.Hirshfeld surface analysis reveals that the cooperative nature of the transition is influenced by non-conventional hydrogen bonding andπ-πinteractions.This study represents the first report of reversible interface propagation in Fe(Ⅲ)complexes,providing valuable insights into the fundamental mechanisms that govern spin crossover transitions in these systems.展开更多
基金supported by 2010 Natural Science foundation of China(81060160)2008 Natural Science Foundation of China(30860082)+1 种基金2009 Natural Science Foundation of China(090209)2010 Key Scientific and Technological Project of Hainan Province(zdxm20100043)
文摘Hainan is an island province in south China with a high frequency of unconventional emergencies due to its special geographic location and national military defense role.Given the limited transportation route from Hainan to the outside world,self-rescue is more important to Hainan Province than other provinces in China and it is therefore imperative to establish an independent, scientific as well as efficient provincal disaster medical system in Hainan.The regulatory role for vulnerability analysis/assessment has been demonstrated in establisment of disaster medical system in varoius countries and or regions.In this paper,we attempt to describe/propose how to adopt vulnerability assessment through mathematical modeling of major biophysical social vulnerability factors to establish an independent,scientific,effieicnt and comprehensive provincial disaster medical system in Hainan.
基金supported by the the National Natural Science Foundation of China (Nos.21875093, 22161002 and22105089)Natural Science Foundation of Jiangxi Province (Nos.20224BAB214005, 20204BCJ22015 and 20202ACBL203001)Jiangxi Provincial Key Laboratory of Functional Molecular Materials Chemistry (No.20212BCD42018)。
文摘The application of multifunctional materials in various fields such as electronics and signal processors has attracted massive attention. Herein, a new organic-inorganic hybrid material [Et_(3)NCH_(2)Cl]_(2)[MnBr_(4)](1) is reported, which contains two organic amines cations and one [MnBr_(4)] tetrahedral ion. Compound 1 has a dielectric anomaly signal at 338 K, which proves its thermodynamic phase transition. The single crystal measurements at 200 K and 380 K show that the phase transition of compound 1 is caused by the thermal vibration of organic amine cations in the lattice. Moreover, compound 1 shows yellow-green luminescence under UV light irradiation. The magnetism measurements indicate that compound 1 shows switchable magnetic properties. This organic–inorganic material is a multifunctional material with dielectric, optical, and magnetic synergetic switchable effects, which expands a new direction for designing multifunctional materials.
基金Centro de Química Estrutural(CQE)and Institute of Molecular Sciences(IMS)acknowledge the financial support of Fundação para a Ciência e Tecnologia(FCT),projects UID/00100/2025,UID/PRR/100/2025LA/P/0056/2020(https://doi.org/10.54499/LA/P/0056/2020),respectively+6 种基金Centro de Física Teórica e Computacional(CFTC)acknowledges FCT under contracts no.UIDB/00618/2020(https://doi.org/10.54499/UIDB/00618/2020)and UIDP/00618/2020(https://doi.org/10.54499/UIDP/00618/2020).PN Martinho thanks FCT for grant PTDCQUI-QIN0252_2021(https://doi.org/10.54499/PTDC/QUI-QIN/0252/2021)for contract 2023.15441.TENURE.003/CP00003/CT00011 and the co-financing by the PRR-Recovery and Resilience Plan of the European UnionThis research was partly funded by ANR(Agence Nationale de la Recherche Scientifique),grant number Mol-CoSM ANR-20-CE07-0028-0CNRS through the MITI interdisciplinary programs through its exploratory research program.The authors acknowledge financial support from the Spanish Ministerio de Ciencia e Innovación through grants MCIN/AEI/10.13039/501100011033 PID2021-126076NB-I00 and TED2021-129506B-C22,funded partially by FEDER Una manera de hacer Europa,the unit of excellence María de Maeztu CEX2021-001202-M granted to the IQTCUB,the COST Action CA18234the Generalitat de Catalunya 2021SGR00079 grantF.V.thanks the ICREA Academia Award 2023 Ref.Ac2216561COST Actions CA21101(COSY)and CA22131(LUCES)are also acknowledged.
文摘We report the unprecedented observation of reversible interface propagation in the switchable cooperative Fe(Ⅲ)spin crossover compound[Fe(3-EtO-salEen)_(2)]NO_(3),where 3-EtO-salEen is 3-ethoxy-N-ethyl-N-(2-aminoethyl)salicylaldiminate.This complex exhibits a spin transition from low-spin to high-spin states,triggered by temperature around 345 K.Magnetic susceptibility measurements reveal an abrupt transition with a thermal hysteresis of 5 K.Differential scanning calorimetry confirms both endothermic(T_(on)=344.50 K and T_(max)=345.61 K,Δ_(trs)H°_(m)=12:05 kJ mol^(-1)andΔ_(trs)S°_(m)=34:98 J mol^(-1))and exothermic(T_(on)=344.40 K,T_(max)=345.49 K,Δ_(trs)H°_(m)=10:98 kJ mol^(-1)andΔ_(trs)S°_(m)=31:88 J mol^(-1))peaks corresponding to the spin transition temperatures.Cryogenic optical microscopy reveals rapid interface propagation,with velocities(v_(HS→LS)≃1672μm s^(−1)and v_(LS→HS)≃850μm s^(−1))significantly higher than those observed in traditional Fe(II)-based spin crossover materials.The high-speed propagation is attributed to the combined effect of the reduced volume change and lower elastic energy barriers associated with the transition in Fe(Ⅲ)systems and the high values of the transition temperatures.Hirshfeld surface analysis reveals that the cooperative nature of the transition is influenced by non-conventional hydrogen bonding andπ-πinteractions.This study represents the first report of reversible interface propagation in Fe(Ⅲ)complexes,providing valuable insights into the fundamental mechanisms that govern spin crossover transitions in these systems.
