NSTL国家科技图书文献中心

1. Silica-supported Iron trifluoroacetate and trichloroacetate Lewis acid prompted one-pot solvent-free green synthesis and DFT studies of 4 H -chromene-3-carboxamide NSTL国家科技图书文献中心

Gholap, Dnyaneshwar ... | Suradkar, Rohini ... - 《Monatshefte fur Chemie》 - 2025,156(3) - 351～364 - 共14页

摘要：Silica-based iron trichloroacetate and | trifluoroacetate prompted green synthesis of 4H-chromene-3 | -carboxamide have been achieved successfully by an economic | , sustainable, and environment eco-friendly three-component | one-pot reaction of aldehydes, acetoacetanilide, and

关键词： Silica-based Lewis acids | Iron trifluoroacetate | Iron trichloroacetate | Dimedone | Acetoacetanilide | Solvent | Free synthesis | 4H-chromene-3-carboxamide | DFT

2. Synthesis of pyrazolopyrano pyrimidines via one-pot solvent free greener approach utilizing lanthanum trifluoroacetate and trichloroacetate Lewis acids supported on mesoporous silica: An experimental and DFT studies NSTL国家科技图书文献中心

Gholap, Dnyaneshwar ... | Suradkar, Rohini ... - 《Polyhedron》 - 2025,265 - 共13页

摘要： Lewis acids based over silica via one-pot reaction | Herein, an economic, environment-benign and | sustainable greener protocol was developed for the | production of pyrazolopyrano pyrimidines utilizing water | competent Lanthanum trifluoroacetate and trichloroacetate

关键词： Silica doped Lewis acid | Lanthanum trifluoroacetate and | trichloroacetate | Barbituric acid | Ethyl acetoacetate | Solvent-free synthesis | Pyrazolopyrano pyrimidine | DFT

3. Should we still be using HCl in the synthesis of SBA-15 and Al-SBA-15? NSTL国家科技图书文献中心

Iga, Gustavo D. | Vieira, Jose Lucas ... - 《Microporous and mesoporous materials: The offical journal of the International Zeolite Association》 - 2024,378 - ARTN 113222～ - 共12页

摘要： synthesizing SBA-15 and Al-SBA-15, and using different acids | of silica* condensation in SBA-15HCl and SBA-15* | methodology based* on the pH-adjusting method was proposed* | . The samples displayed a Br & oslash;nsted/Lewis | HCl is not always the best option for

关键词： SBA-15 | Al-SBA-15 | Acid-effect | Hofmeister | Counterion | MESOPOROUS MOLECULAR-SIEVES | HYDROTHERMAL STABILITY | CATALYTIC-PROPERTIES | POROUS STRUCTURE | SILICA...

4. Direct production of ethyl levulinate from carbohydrates and biomass waste catalyzed by modified porous silica with multiple acid sites NSTL国家科技图书文献中心

Luxin Zhang | Lu Tian ... - 《Process biochemistry》 - 2022,121(Oct.) - 152～162 - 共11页

摘要：Three modified porous silica* solid acid* | catalysts with multiple acid sites (SO_3H-Al/Silica, SO_3H | -Al-Zr/Silica, and SO_3H-Zr/Silica) were prepared | showed that both Bronsted (B) and Lewis* (L) acid sites* | , including strong sulfonic acids and several weak acids

关键词： Biomass | Biorefinery | Multiple acid sites | Modified porous silica | Ethyl levulinate

5. Precursor carboxy-silica for functionalization with interactive ligands. I. Carbodiimide-assisted preparation of silica-bonded stationary phases with octadecyl, naphthyl, and anthracenyl ligands: Comparison of their selectivity and retentivity EI 工程索引 SCIE Web of Science核心 NSTL国家科技图书文献中心

Paranamana, Nilushi | El Rassi, Ziad - 《Journal of separation science.》 - 2020,43(24) - 共11页

摘要： the octadecyl-silica. Nitro-substituted amino acids | A precursor carboxy-silica* support was* | by sequentially reacting 5 mu m silica* particles* | . The carboxy-silica* thus obtained was subsequently* | -, naphthyl-, and anthracenyl-silica* columns. The three*

关键词： alkyl& | 8208 | silica columns | aromatics | aryl silica columns | carboxy& | silica precursors | dinitrophenyl amino acids | reversed& | phase chromatography

6. MOF-Assisted Synthesis of Highly Mesoporous Cr2O3/SiO2 Nanohybrids for Efficient Lewis-Acid-Catalyzed Reactions SCOPUS Scopus数据库 SCIE Web of Science核心 NSTL国家科技图书文献中心

Chen, Fengfeng | Shen, Kui ... - 《ACS applied materials & interfaces》 - 2020,12(43) - 48691～48699 - 共9页

摘要：The facile fabrication of porous solid acids | acids for many acid-catalyzed reactions in the | (denoted as Meso-Cr-Si-O) with highly dispersed Lewis | tuned by simply controlling the amount of silica | density of Lewis* acidic sites in the obtained Meso-Cr-Si*

关键词： metal-organic frameworks | bottom-up strategy | mesoporous metal oxides | Lewis-acid-catalyzed reaction | heterogeneous catalysis

7. Mechanistic Insight of the Catalytic Role of WOX/SiO2 Catalyst in 2,5-Dimethylfuran to Para-xylene Conversion by DFT Calculation SCIE Web of Science核心 EI 工程索引 SCOPUS Scopus数据库 NSTL国家科技图书文献中心

Cui, Ziheng | Fang, Yunming ... - 《Catalysis Letters》 - 2020,150(3) - 794～801 - 共8页

摘要： PX is differs significantly from other Lewis acids | dispersed tungsten oxide supported on the amorphous silica | of a Lewis* acid catalyst. Unexpectedly and although* | to be a Lewis* acid, its mechanism for catalyzing* | observed in other Lewis* acid catalyzed systems are not*

关键词： WOX | SiO2 catalyst | DFT calculation | 2 | 5-Dimethylfuran to para-xylene conversion | Diels-Alder cycloaddition | Dehydration

8. Confined Transformation of UiO-66 Nanocrystals to Yttria-Stabilized Zirconia with Hierarchical Pore Structures for Catalytic Applications NSTL国家科技图书文献中心

Qin, Runze | Zeng, Hua Chun - 《Advanced functional materials》 - 2019,29(39) - 1903264.1～1903264.12 - 共12页

摘要：Solid acids* as a substitution for hazardous* | liquid acids* (e.g., HF and H2SO4) can promote many* | from a zirconium-based* metal-organic framework (UiO* | zirconia (YSZ) encapsulated inside a mesoporous silica | phase is found with rich accessible Lewis* acid and*

关键词： cascade reaction | CO2 hydrogenation | metal-organic frameworks | micro | mesoporous metal oxide | nanoreactor | yttria-stabilized zirconia

9. Epoxidation of cyclohexene with H2O2 over efficient water-tolerant heterogeneous catalysts composed of mono-substituted phosphotungstic acid on co-functionalized SBA-15 EI 工程索引 SCOPUS Scopus数据库 SCIE Web of Science核心 NSTL国家科技图书文献中心

Jin, Manman | Niu, Qingtao ... - 《Applied Organometallic Chemistry》 - 2019,33(9) - 5115-1～5115-12 - 共12页

摘要：A series of Keggin-type heteropolyacid-based | - substituted phosphotungstic acids* (Co-/Fe-/Cu-POM) on octyl* | -amino-co-functionalized mesoporous silica* SBA-15* | mesochannels of SBA-15, and both types of Bronsted and Lewis | heterogeneous catalysts (Co-/Fe-/Cu-POM-octyl-NH3-SBA-15) were

关键词： co-functionalized SBA-15 | cyclohexene | epoxidation | heteropolyacid | mono-substituted

10. Consequences of Confinement for Alkene Epoxidation with Hydrogen Peroxide on Highly Dispersed Group 4 and 5 Metal Oxide Catalysts SCOPUS Scopus数据库 SCIE Web of Science核心 NSTL国家科技图书文献中心

DanielT. Bregante | Nicholas E. Thornbur...... - 《ACS catalysis》 - 2018,8(4) - 2995～3010 - 共16页

摘要： affinities (i.e., stronger Lewis* acids) are more active for* | mesoporous silica* (M-SiO_(2)) irreversibly activate* | alkenes on Ti-based* catalysts, while M-(η~(2)-O_(2* | deuterated acetonitrile coordinated to Lewis* acid sites* | )) species (i.e., those formed at stronger Lewis* acid sites*

摘要：Silica-based iron trichloroacetate and | trifluoroacetate prompted green synthesis of 4H-chromene-3 | -carboxamide have been achieved successfully by an economic | , sustainable, and environment eco-friendly three-component | one-pot reaction of aldehydes, acetoacetanilide, and

关键词： Silica-based Lewis acids | Iron trifluoroacetate | Iron trichloroacetate | Dimedone | Acetoacetanilide | Solvent | Free synthesis | 4H-chromene-3-carboxamide | DFT

摘要： Lewis acids based over silica via one-pot reaction | Herein, an economic, environment-benign and | sustainable greener protocol was developed for the | production of pyrazolopyrano pyrimidines utilizing water | competent Lanthanum trifluoroacetate and trichloroacetate

关键词： Silica doped Lewis acid | Lanthanum trifluoroacetate and | trichloroacetate | Barbituric acid | Ethyl acetoacetate | Solvent-free synthesis | Pyrazolopyrano pyrimidine | DFT

摘要： synthesizing SBA-15 and Al-SBA-15, and using different acids | of silica* condensation in SBA-15HCl and SBA-15* | methodology based* on the pH-adjusting method was proposed* | . The samples displayed a Br & oslash;nsted/Lewis | HCl is not always the best option for

关键词： SBA-15 | Al-SBA-15 | Acid-effect | Hofmeister | Counterion | MESOPOROUS MOLECULAR-SIEVES | HYDROTHERMAL STABILITY | CATALYTIC-PROPERTIES | POROUS STRUCTURE | SILICA...

摘要：Three modified porous silica* solid acid* | catalysts with multiple acid sites (SO_3H-Al/Silica, SO_3H | -Al-Zr/Silica, and SO_3H-Zr/Silica) were prepared | showed that both Bronsted (B) and Lewis* (L) acid sites* | , including strong sulfonic acids and several weak acids

关键词： Biomass | Biorefinery | Multiple acid sites | Modified porous silica | Ethyl levulinate

摘要： the octadecyl-silica. Nitro-substituted amino acids | A precursor carboxy-silica* support was* | by sequentially reacting 5 mu m silica* particles* | . The carboxy-silica* thus obtained was subsequently* | -, naphthyl-, and anthracenyl-silica* columns. The three*

关键词： alkyl& | 8208 | silica columns | aromatics | aryl silica columns | carboxy& | silica precursors | dinitrophenyl amino acids | reversed& | phase chromatography

摘要：The facile fabrication of porous solid acids | acids for many acid-catalyzed reactions in the | (denoted as Meso-Cr-Si-O) with highly dispersed Lewis | tuned by simply controlling the amount of silica | density of Lewis* acidic sites in the obtained Meso-Cr-Si*

关键词： metal-organic frameworks | bottom-up strategy | mesoporous metal oxides | Lewis-acid-catalyzed reaction | heterogeneous catalysis

摘要： PX is differs significantly from other Lewis acids | dispersed tungsten oxide supported on the amorphous silica | of a Lewis* acid catalyst. Unexpectedly and although* | to be a Lewis* acid, its mechanism for catalyzing* | observed in other Lewis* acid catalyzed systems are not*

关键词： WOX | SiO2 catalyst | DFT calculation | 2 | 5-Dimethylfuran to para-xylene conversion | Diels-Alder cycloaddition | Dehydration

摘要：Solid acids* as a substitution for hazardous* | liquid acids* (e.g., HF and H2SO4) can promote many* | from a zirconium-based* metal-organic framework (UiO* | zirconia (YSZ) encapsulated inside a mesoporous silica | phase is found with rich accessible Lewis* acid and*

关键词： cascade reaction | CO2 hydrogenation | metal-organic frameworks | micro | mesoporous metal oxide | nanoreactor | yttria-stabilized zirconia

关键词： co-functionalized SBA-15 | cyclohexene | epoxidation | heteropolyacid | mono-substituted

关键词： epoxidation | hydrogen peroxide | niobium | reactive intermediates | solvation | tantalum | titanium

4008-161-200 800-990-8900

国家科技图书文献中心

摘要：Silica-based iron trichloroacetate and | trifluoroacetate prompted green synthesis of 4H-chromene-3 | -carboxamide have been achieved successfully by an economic | , sustainable, and environment eco-friendly three-component | one-pot reaction of aldehydes, acetoacetanilide, and

关键词： Silica-based Lewis acids | Iron trifluoroacetate | Iron trichloroacetate | Dimedone | Acetoacetanilide | Solvent | Free synthesis | 4H-chromene-3-carboxamide | DFT

摘要： Lewis acids based over silica via one-pot reaction | Herein, an economic, environment-benign and | sustainable greener protocol was developed for the | production of pyrazolopyrano pyrimidines utilizing water | competent Lanthanum trifluoroacetate and trichloroacetate

关键词： Silica doped Lewis acid | Lanthanum trifluoroacetate and | trichloroacetate | Barbituric acid | Ethyl acetoacetate | Solvent-free synthesis | Pyrazolopyrano pyrimidine | DFT

摘要： synthesizing SBA-15 and Al-SBA-15, and using different acids | of silica condensation in SBA-15HCl and SBA-15 | methodology based on the pH-adjusting method was proposed | . The samples displayed a Br & oslash;nsted/Lewis | HCl is not always the best option for

关键词： SBA-15 | Al-SBA-15 | Acid-effect | Hofmeister | Counterion | MESOPOROUS MOLECULAR-SIEVES | HYDROTHERMAL STABILITY | CATALYTIC-PROPERTIES | POROUS STRUCTURE | SILICA...

摘要：Three modified porous silica solid acid | catalysts with multiple acid sites (SO_3H-Al/Silica, SO_3H | -Al-Zr/Silica, and SO_3H-Zr/Silica) were prepared | showed that both Bronsted (B) and Lewis (L) acid sites | , including strong sulfonic acids and several weak acids

关键词： Biomass | Biorefinery | Multiple acid sites | Modified porous silica | Ethyl levulinate

摘要： the octadecyl-silica. Nitro-substituted amino acids | A precursor carboxy-silica support was | by sequentially reacting 5 mu m silica particles | . The carboxy-silica thus obtained was subsequently | -, naphthyl-, and anthracenyl-silica columns. The three

关键词： alkyl& | 8208 | silica columns | aromatics | aryl silica columns | carboxy& | silica precursors | dinitrophenyl amino acids | reversed& | phase chromatography

摘要：The facile fabrication of porous solid acids | acids for many acid-catalyzed reactions in the | (denoted as Meso-Cr-Si-O) with highly dispersed Lewis | tuned by simply controlling the amount of silica | density of Lewis acidic sites in the obtained Meso-Cr-Si

关键词： metal-organic frameworks | bottom-up strategy | mesoporous metal oxides | Lewis-acid-catalyzed reaction | heterogeneous catalysis

摘要： PX is differs significantly from other Lewis acids | dispersed tungsten oxide supported on the amorphous silica | of a Lewis acid catalyst. Unexpectedly and although | to be a Lewis acid, its mechanism for catalyzing | observed in other Lewis acid catalyzed systems are not

关键词： WOX | SiO2 catalyst | DFT calculation | 2 | 5-Dimethylfuran to para-xylene conversion | Diels-Alder cycloaddition | Dehydration

摘要：Solid acids as a substitution for hazardous | liquid acids (e.g., HF and H2SO4) can promote many | from a zirconium-based metal-organic framework (UiO | zirconia (YSZ) encapsulated inside a mesoporous silica | phase is found with rich accessible Lewis acid and

关键词： cascade reaction | CO2 hydrogenation | metal-organic frameworks | micro | mesoporous metal oxide | nanoreactor | yttria-stabilized zirconia

摘要：A series of Keggin-type heteropolyacid-based | - substituted phosphotungstic acids (Co-/Fe-/Cu-POM) on octyl | -amino-co-functionalized mesoporous silica SBA-15 | mesochannels of SBA-15, and both types of Bronsted and Lewis | heterogeneous catalysts (Co-/Fe-/Cu-POM-octyl-NH3-SBA-15) were

关键词： co-functionalized SBA-15 | cyclohexene | epoxidation | heteropolyacid | mono-substituted

摘要： affinities (i.e., stronger Lewis acids) are more active for | mesoporous silica (M-SiO_(2)) irreversibly activate | alkenes on Ti-based catalysts, while M-(η~(2)-O_(2 | deuterated acetonitrile coordinated to Lewis acid sites | )) species (i.e., those formed at stronger Lewis acid sites

关键词： epoxidation | hydrogen peroxide | niobium | reactive intermediates | solvation | tantalum | titanium

4008-161-200 800-990-8900

国家科技图书文献中心

摘要： synthesizing SBA-15 and Al-SBA-15, and using different acids | of silica* condensation in SBA-15HCl and SBA-15* | methodology based* on the pH-adjusting method was proposed* | . The samples displayed a Br & oslash;nsted/Lewis | HCl is not always the best option for

摘要：Three modified porous silica* solid acid* | catalysts with multiple acid sites (SO_3H-Al/Silica, SO_3H | -Al-Zr/Silica, and SO_3H-Zr/Silica) were prepared | showed that both Bronsted (B) and Lewis* (L) acid sites* | , including strong sulfonic acids and several weak acids

摘要： the octadecyl-silica. Nitro-substituted amino acids | A precursor carboxy-silica* support was* | by sequentially reacting 5 mu m silica* particles* | . The carboxy-silica* thus obtained was subsequently* | -, naphthyl-, and anthracenyl-silica* columns. The three*

摘要：The facile fabrication of porous solid acids | acids for many acid-catalyzed reactions in the | (denoted as Meso-Cr-Si-O) with highly dispersed Lewis | tuned by simply controlling the amount of silica | density of Lewis* acidic sites in the obtained Meso-Cr-Si*

摘要： PX is differs significantly from other Lewis acids | dispersed tungsten oxide supported on the amorphous silica | of a Lewis* acid catalyst. Unexpectedly and although* | to be a Lewis* acid, its mechanism for catalyzing* | observed in other Lewis* acid catalyzed systems are not*

摘要：Solid acids* as a substitution for hazardous* | liquid acids* (e.g., HF and H2SO4) can promote many* | from a zirconium-based* metal-organic framework (UiO* | zirconia (YSZ) encapsulated inside a mesoporous silica | phase is found with rich accessible Lewis* acid and*