caa a22 4500 606195149 CHVBK 20210128100917.0 cr unu---uuuuu 210128e20150601xx s 000 0 eng 10.1007/s10934-015-9943-7 doi (NATIONALLICENCE)springer-10.1007/s10934-015-9943-7 Preparation and characterization of mesostructured Zr-SBA-16: efficient Lewis acidic catalyst for Hantzsch reaction [Elektronische Daten] [Rajamanickam Maheswari, Vinju Srinivasan, Anand Ramanathan, Muthusamy Pachamuthu, Rajamanickam Rajalakshmi, Gaffar Imran] Mesostructured Zr-SBA-16 (3D cubic arrangement, Im3m space group) with different Si/Zr ratio was successfully synthesized by using Pluronic F127 triblock copolymer and n-butanol as a structure directing agent. Successful incorporation of Zr4+ ions was achieved without any pH adjustments up to ~6.5 wt% of Zr loading. Different analytical techniques such as SAXS, N2-physisortion and HR-TEM were used to ascertain the structure of Zr-SBA-16 samples whereas, diffuse reflectance UV-Vis, pyridine adsorbed FTIR and NH3 desorbed TPD methods were assessed to understand the nature of Zr incorporation. The Lewis acidity of Zr-SBA-16 was explored in the synthesis of Hantzsch 1,4-dihydropyridine derivatives via condensation of substituted benzaldehyde, ethyl acetoacetate and ammonium acetate. Springer Science+Business Media New York, 2015 Amorphous materials nationallicence Zr-SBA-16 nationallicence Lewis acid nationallicence Hantzsch reaction nationallicence Maheswari Rajamanickam Department of Chemistry, Anna University, 600025, Chennai, India aut Srinivasan Vinju Department of Chemistry, Anna University, 600025, Chennai, India aut Ramanathan Anand Center for Environmentally Beneficial Catalysis, The University of Kansas, 66047, Lawrence, KS, USA aut Pachamuthu Muthusamy Department of Chemistry, Anna University, 600025, Chennai, India aut Rajalakshmi Rajamanickam Department of Chemistry, Anna University, 600025, Chennai, India aut Imran Gaffar Department of Chemistry, Anna University, 600025, Chennai, India aut Journal of Porous Materials Springer US; http://www.springer-ny.com 22/3(2015-06-01), 705-711 1380-2224 22:3<705 2015 22 10934 https://doi.org/10.1007/s10934-015-9943-7 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10934-015-9943-7 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Maheswari Rajamanickam Department of Chemistry, Anna University, 600025, Chennai, India aut NATIONALLICENCE 700 1- Srinivasan Vinju Department of Chemistry, Anna University, 600025, Chennai, India aut NATIONALLICENCE 700 1- Ramanathan Anand Center for Environmentally Beneficial Catalysis, The University of Kansas, 66047, Lawrence, KS, USA aut NATIONALLICENCE 700 1- Pachamuthu Muthusamy Department of Chemistry, Anna University, 600025, Chennai, India aut NATIONALLICENCE 700 1- Rajalakshmi Rajamanickam Department of Chemistry, Anna University, 600025, Chennai, India aut NATIONALLICENCE 700 1- Imran Gaffar Department of Chemistry, Anna University, 600025, Chennai, India aut NATIONALLICENCE 773 0- Journal of Porous Materials Springer US; http://www.springer-ny.com 22/3(2015-06-01), 705-711 1380-2224 22:3<705 2015 22 10934