The solute-solute and solute-solvent interactions of drug semicarbazide hydrochloride with carbohydrates(Dglucose/D-sucrose)are investigated by using volumetric,viscometric and acoustic properties.The measurements of ...The solute-solute and solute-solvent interactions of drug semicarbazide hydrochloride with carbohydrates(Dglucose/D-sucrose)are investigated by using volumetric,viscometric and acoustic properties.The measurements of the densitiesρ,ultrasonic speeds u,and viscositiesη.of semicarbazide hydrochloride in 5% and 10%D-glucose/D-sucrose+water(w/w)solutions were carried out at temperatures(293.15-318.15)K and at pressure,p=101 kPa.The apparent molar volumes,Vϕ,limiting apparent molar volumes,V°ϕ,apparent molar compressibilities,Ks,ϕ,limiting apparent molar compressibilities,K°s;ϕ,partial molar expansibilities,E°ϕ,transfer volumes,V°ϕ;tr and transfer compressibilities,K°s;ϕ;tr have been calculated from the experimental data.The viscosity data were examined by using the Jones-Dole equation and the viscosity A and B coefficients were evaluated.The results are discussed in terms of solute-solute and solute-solvent interactions in these solutions.The structure making/breaking ability of semicarbazide hydrochloride is examined using the sign of temperature derivative of Bcoefficient,dB/dT.展开更多
Tin perovskites with exemplary optoelectronic properties ofer potential application in lead-free perovskite solar cells.However,Sn vacancies and undercoordinated Sn ions on the tin perovskite surfaces can create deep-...Tin perovskites with exemplary optoelectronic properties ofer potential application in lead-free perovskite solar cells.However,Sn vacancies and undercoordinated Sn ions on the tin perovskite surfaces can create deep-level traps,leading to nonradiative recombination and absorption of nucleophilic O_(2)molecules,impeding further device efciency and stability.Here,in this study,a new additive of semicarbazide hydrochloride(SEM-HCl)with a N–C=O functional group was introduced into the perovskite precursor to fabricate high-quality flms with a low concentration of deep-level trap densities.This,in turn,serves to prevent undesirable interaction between photogenerated carriers and adsorbed oxygen molecules in the device’s operational environment,ultimately reducing the proliferation of superoxide entities.As the result,the SEM-HCl-derived devices show a peak efciency of 10.9%with improved device stability.These unencapsulated devices maintain almost 100%of their initial efciencies after working for 100 h under continuous AM1.5 illumination conditions.展开更多
A green and efficient synthesis of 3-pyrazolyl indoles was developed by the eye 1 ocondensation reactionof β-ethylthio-β-indolyl-α,β-unsaturated ketones with semi carbazide hydrochloride as hydrazine equivalent in...A green and efficient synthesis of 3-pyrazolyl indoles was developed by the eye 1 ocondensation reactionof β-ethylthio-β-indolyl-α,β-unsaturated ketones with semi carbazide hydrochloride as hydrazine equivalent in thepresence of 3 equiv. of PEG400(la/PEG mole ratio of 1:3) in reflux water. This procedure did not require toxichydrazine and product purification, eliminating the use of toxic liquid chemicals.展开更多
文摘The solute-solute and solute-solvent interactions of drug semicarbazide hydrochloride with carbohydrates(Dglucose/D-sucrose)are investigated by using volumetric,viscometric and acoustic properties.The measurements of the densitiesρ,ultrasonic speeds u,and viscositiesη.of semicarbazide hydrochloride in 5% and 10%D-glucose/D-sucrose+water(w/w)solutions were carried out at temperatures(293.15-318.15)K and at pressure,p=101 kPa.The apparent molar volumes,Vϕ,limiting apparent molar volumes,V°ϕ,apparent molar compressibilities,Ks,ϕ,limiting apparent molar compressibilities,K°s;ϕ,partial molar expansibilities,E°ϕ,transfer volumes,V°ϕ;tr and transfer compressibilities,K°s;ϕ;tr have been calculated from the experimental data.The viscosity data were examined by using the Jones-Dole equation and the viscosity A and B coefficients were evaluated.The results are discussed in terms of solute-solute and solute-solvent interactions in these solutions.The structure making/breaking ability of semicarbazide hydrochloride is examined using the sign of temperature derivative of Bcoefficient,dB/dT.
基金supported in part by the National Natural Science Foundation of China(Grant No.62274094)the Natural Science Foundation of Jiangsu Higher Education Institutions(No.22KJB510011)+2 种基金the Open Project Program of Wuhan National Laboratory for Optoelectronics(No.2020WNLOKF012)the Key Laboratory of Modern Optical Technologies of Education Ministry of China,Soochow University(No.KJS2260)the Huali Talents Program of Nanjing University of Posts and Telecommunications,and the Jiangsu Provincial Government Scholarship for Overseas Studies.
文摘Tin perovskites with exemplary optoelectronic properties ofer potential application in lead-free perovskite solar cells.However,Sn vacancies and undercoordinated Sn ions on the tin perovskite surfaces can create deep-level traps,leading to nonradiative recombination and absorption of nucleophilic O_(2)molecules,impeding further device efciency and stability.Here,in this study,a new additive of semicarbazide hydrochloride(SEM-HCl)with a N–C=O functional group was introduced into the perovskite precursor to fabricate high-quality flms with a low concentration of deep-level trap densities.This,in turn,serves to prevent undesirable interaction between photogenerated carriers and adsorbed oxygen molecules in the device’s operational environment,ultimately reducing the proliferation of superoxide entities.As the result,the SEM-HCl-derived devices show a peak efciency of 10.9%with improved device stability.These unencapsulated devices maintain almost 100%of their initial efciencies after working for 100 h under continuous AM1.5 illumination conditions.
基金Supported by the National Natural Science Foundation of China(No.20902010)the Foundation of Science and Technology Research Projects of the 13th Five-year Plan of Jilin Provincial Department of Education,China(No,2016037).
文摘A green and efficient synthesis of 3-pyrazolyl indoles was developed by the eye 1 ocondensation reactionof β-ethylthio-β-indolyl-α,β-unsaturated ketones with semi carbazide hydrochloride as hydrazine equivalent in thepresence of 3 equiv. of PEG400(la/PEG mole ratio of 1:3) in reflux water. This procedure did not require toxichydrazine and product purification, eliminating the use of toxic liquid chemicals.
