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Goodarzi F, Karimi AR. New PEG‐Modified Ladder‐Like Silsesquioxane as an Antifoaming Agent. ChemistrySelect 2020. [DOI: 10.1002/slct.202003048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Faranak Goodarzi
- Department of Chemistry Faculty of Science Arak University Arak 38156-8-8349 Iran
| | - Ali Reza Karimi
- Department of Chemistry Faculty of Science Arak University Arak 38156-8-8349 Iran
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Abstract
Cage-like silsesquioxanes are considered to be ideal and versatile building blocks of hybrid materials due to their unique structures and excellent performance. This Perspective highlights recent advances in the field of cage-like silsesquioxane-based hybrid materials, ranging from monomer functionalization and materials preparation to application. The existing issues are reviewed and the challenges and prospects in this field are also discussed for further development and exploitation.
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Affiliation(s)
- Yajing Du
- Key Laboratory of Special Functional Aggregated Materials, Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, Jinan, 250100, P. R. China.
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Nunes SC, de Zea Bermudez V. Structuring of Amide Cross-Linked Non-Bridged and Bridged Alkyl-Based Silsesquioxanes. CHEM REC 2018; 18:724-736. [DOI: 10.1002/tcr.201700096] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2017] [Accepted: 01/16/2018] [Indexed: 02/04/2023]
Affiliation(s)
- S. C. Nunes
- CICS - Health Sciences Research Center and Chemistry Department; University of Beira Interior; Rua Marquês D'Ávila e Bolama 6201-001 Covilhã Portugal
| | - V. de Zea Bermudez
- Chemistry Department and CQ-VR; University of Trás-os-Montes e Alto Douro Quinta de Prados; 5000-801 Vila Real Portugal
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Pereira RFP, Nunes SC, Toquer G, Cardoso MA, Valente AJM, Ferro MC, Silva MM, Carlos LD, Ferreira RAS, de Zea Bermudez V. Novel Highly Luminescent Amine-Functionalized Bridged Silsesquioxanes. Front Chem 2018; 5:131. [PMID: 29379781 PMCID: PMC5775297 DOI: 10.3389/fchem.2017.00131] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2017] [Accepted: 12/22/2017] [Indexed: 11/13/2022] Open
Abstract
Amine-functionalized bridged silsesquioxanes (BSs) were synthesized from bis[(3-trimethoxysilyl)propyl] amine via a solvent-mediated route. BS-1 and BS-2 were obtained at neutral pH with sub- and stoichiometric amounts of water, respectively, and high tetrahydrofuran content. BS-3 was prepared with hyperstoichiometric water concentration, high tetrahydrofuran content, and hydrochloric acid. BS-4 was synthesized with hyperstoichiometric water concentration, high ethanol content, and sodium hydroxide. BS-1 and BS-2 were produced as transparent films, whereas BS-3 and BS-4 formed white powders. Face-to-face stacking of flat or folded lamellae yielded quasi-hydrophobic platelets with emission quantum yields of 0.05 ± 0.01 (BS-1 and BS-2) or superhydrophilic onion-like nanoparticles with exciting emission quantum yields of 0.38 ± 0.03 (BS-3) and 0.33 ± 0.04 (BS-4), respectively. The latter two values are the largest ever reported for amine-functionalized siloxane-based hybrids lacking aromatic groups. Fast Grotthus proton hopping between = NH2+/ = NH groups (BS-3) and = N−/ = NH groups (BS-4), promoted by H+ and OH− ions, respectively, and aided by short amine-amine contacts provided by the onion-like morphology, account for this unique optical behavior.
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Affiliation(s)
| | - Sílvia C Nunes
- Chemistry Department and CICS - Health Sciences Research Centre, University of Beira Interior, Covilhã, Portugal
| | - Guillaume Toquer
- Institut de Chimie Séparative de Marcoule - UMR 5257, CEA, CNRS, ENSCM, Université de Montpellier, Marcoule, France
| | - Marita A Cardoso
- Chemistry Department and CQ-VR, University of Trás-os-Montes e Alto Douro, Vila Real, Portugal
| | | | - Marta C Ferro
- Materials and Engineering Department and CICECO - Aveiro Institute of Materials, University of Aveiro, Aveiro, Portugal
| | - Maria M Silva
- Chemistry Center, University of Minho, Braga, Portugal
| | - Luís D Carlos
- Department of Physics, CICECO - Aveiro Institute of Materials, University of Aveiro, Aveiro, Portugal
| | - Rute A S Ferreira
- Department of Physics, CICECO - Aveiro Institute of Materials, University of Aveiro, Aveiro, Portugal
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