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Volumn 104, Issue 36, 2000, Pages 8328-8339

Molecular assembly in ordered mesoporosity: A new class of highly functional nanoscale materials

Author keywords

[No Author keywords available]

Indexed keywords

MOLECULAR STRUCTURE; PORE SIZE; POROSITY; POROUS MATERIALS; STEREOCHEMISTRY; SURFACE CHEMISTRY; SURFACE ROUGHNESS; SYNTHESIS (CHEMICAL);

EID: 0034272739     PISSN: 10895639     EISSN: None     Source Type: Journal    
DOI: 10.1021/jp0009812     Document Type: Article
Times cited : (157)

References (100)
  • 37
    • 33645927729 scopus 로고    scopus 로고
    • Yang, P.; Wirnberger, G.; Huang, H. C.; Cordero, S. R.; McGehee, M D.; Scott, B.; Deng, T.; Whitesides, G. M.; Chmelka, B. F.; Buratto, S. K.; Stucky, G. D. Science 2000, 257, 465.
    • (2000) Science , vol.257 , pp. 465
  • 58
  • 65
    • 85037481429 scopus 로고    scopus 로고
    • note
    • 29Si chemical shift was referenced to TMS.
  • 70
    • 0004091818 scopus 로고    scopus 로고
    • William. C. Brown: Dubuque, IA
    • Zubay, G. L. Biochemistry, 4th ed.; William. C. Brown: Dubuque, IA, 1998; pp 159-176.
    • (1998) Biochemistry, 4th Ed. , pp. 159-176
    • Zubay, G.L.1
  • 82
    • 85037469603 scopus 로고    scopus 로고
    • note
    • The hydrolysis of p-nitrophenylacetate (PNPA) to p-nitrophenol was studied in 0.1 M tris-HCl buffer (pH = 7.6) solutions. The kinetic products were measured on UV-vis spectrophotometer (on a HP 8453 UV-visible Spectrophotometer) (PNPA: 273 nm. p-nitrophenol: 400 nm.) after the solution was filtered using a 0.2 uM syringe filter. The amount of p-nitrophenol released was calibrated by known concentration of pure p-nitrophenol.
  • 90
    • 85037478667 scopus 로고    scopus 로고
    • note
    • 62 Linear template molecules (dipod, 2,4-bis(p-formyIphenoxy)-6-methoxy-1,3,5-triazine) were synthesized by the same procedure using 2,4-dichloro-6-methoxy-1,3,5-triazine instead of cyanuric chloride as a starting material with two equivalent moles of p-hydroxybenzaldehyde. The tripod or dipod molecules were then reacted with 3-aminopropyltrimethoxysilane (APS) at room temperature to form tripod-APS or dipodAPS through Schiff bases. This Schiff base was added to a mesoporous silica suspension in toluene and refluxed for 6 h. The tripods should bind to the substrate with a face-on conformation through the amine groups on the three corners, and the dipods should bind to the substrate with an edgeon conformation through the amine groups on the two ends. After 6 h, long-chain organic silanes, such as octadecyltrimethoxysilane (OTS), were added to the solution mixture to form the long-chain molecular monolayer coating. The template molecules were subsequently removed by acid hydrolysis (HCl) of the Schiff bases with aqueous methanol for 4 h.
  • 91
    • 85037460954 scopus 로고    scopus 로고
    • note
    • The adsorption capacity toward dipod or tripod was determined on a HP 8453 UV-Vis spectrophotometer. In all experiments, 0.02 g of each sample was equilibrated with 10.0 mL of different concentration of dipod or tripod in toluene solutions in stoppered glass vials, and these mixtures were stirred for 4 h on the Environ Shaker at room temperature. The difference in the template concentrations before and after equilibration gave the adsorbed amount on the solid samples.
  • 92
    • 85037446802 scopus 로고    scopus 로고
    • note
    • The adsorption study was performed similarly to ref 13, except that a mixture of ethanol and toluene (50:50 by volume) was used as the solvent.
  • 95
    • 85037479785 scopus 로고    scopus 로고
    • note
    • In a typical procedure, 0.05 g of each catalyst and benzaldehyde (0.212 g, 2.0 mmol) were stirred in dry toluene (10.0 mL). To this solution, 0.126 mL (2.0 mmol) of malononitrile was added, and the mixture was stirred at room temperature. The reaction was monitored periodically by UV-Vis spectrophotometer (285 nm for benzaldehyde and 314 nm for product). Similar procedure was used for 3-pentanone, except that the reaction was carried out at 110 °C.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.