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Mohanan S, Guan X, Liang M, Karakoti A, Vinu A. Stimuli-Responsive Silica Silanol Conjugates: Strategic Nanoarchitectonics in Targeted Drug Delivery. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023:e2301113. [PMID: 36967548 DOI: 10.1002/smll.202301113] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2023] [Revised: 02/28/2023] [Indexed: 06/18/2023]
Abstract
The design of novel drug delivery systems is exceptionally critical in disease treatments. Among the existing drug delivery systems, mesoporous silica nanoparticles (MSNs) have shown profuse promise owing to their structural stability, tunable morphologies/sizes, and ability to load different payload chemistry. Significantly, the presence of surface silanol groups enables functionalization with relevant drugs, imaging, and targeting agents, promoting their utility and popularity among researchers. Stimuli-responsive silanol conjugates have been developed as a novel, more effective way to conjugate, deliver, and release therapeutic drugs on demand and precisely to the selected location. Therefore, it is urgent to summarize the current understanding and the surface silanols' role in making MSN a versatile drug delivery platform. This review provides an analytical understanding of the surface silanols, chemistry, identification methods, and their property-performance correlation. The chemistry involved in converting surface silanols to a stimuli-responsive silica delivery system by endogenous/exogenous stimuli, including pH, redox potential, temperature, and hypoxia, is discussed in depth. Different chemistries for converting surface silanols to stimuli-responsive bonds are discussed in the context of drug delivery. The critical discussion is culminated by outlining the challenges in identifying silanols' role and overcoming the limitations in synthesizing stimuli-responsive mesoporous silica-based drug delivery systems.
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Affiliation(s)
- Shan Mohanan
- Global Innovative Centre for Advanced Nanomaterials, The School of Engineering, College of Engineering, Science and Environment, The University of Newcastle, Callaghan, 2308, Australia
| | - Xinwei Guan
- Global Innovative Centre for Advanced Nanomaterials, The School of Engineering, College of Engineering, Science and Environment, The University of Newcastle, Callaghan, 2308, Australia
| | - Mingtao Liang
- School of Biomedical Sciences and Pharmacy, College of Health Medicine and Wellbeing, The University of Newcastle, Callaghan, 2308, Australia
| | - Ajay Karakoti
- Global Innovative Centre for Advanced Nanomaterials, The School of Engineering, College of Engineering, Science and Environment, The University of Newcastle, Callaghan, 2308, Australia
| | - Ajayan Vinu
- Global Innovative Centre for Advanced Nanomaterials, The School of Engineering, College of Engineering, Science and Environment, The University of Newcastle, Callaghan, 2308, Australia
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Werghi B, Bendjeriou‐Sedjerari A, Jedidi A, Morlanes N, Abou‐Hamad E, Bhatte K, Guan E, Ma T, Aguilar‐Tapia A, Ould‐Chikh S, Cavallo L, Gates BC, Basset J. Tungsten Catalyst Incorporating a Well‐Defined Tetracoordinated Aluminum Surface Ligand for Selective Metathesis of Propane, [(≡Si−O−Si≡)(≡Si−O−)
2
Al−O−W(≡C
t
Bu) (H)
2
]. ChemCatChem 2018. [DOI: 10.1002/cctc.201801779] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Baraa Werghi
- University of Science and Technology 4700 King Abdullah Thuwal 23955-6900 Kingdom of Saudi Arabia
| | | | - Abdesslem Jedidi
- Department of Chemistry Faculty of Science King Abdulaziz University (KAU) Jeddah 21589 Kingdom of Saudi Arabia
| | - Natalia Morlanes
- University of Science and Technology 4700 King Abdullah Thuwal 23955-6900 Kingdom of Saudi Arabia
| | - Edy Abou‐Hamad
- King Abdullah University of Science and Technology(KAUST) Core Labs Thuwal 23955-6900 Kingdom of Saudi Arabia
| | - Kushal Bhatte
- University of Science and Technology 4700 King Abdullah Thuwal 23955-6900 Kingdom of Saudi Arabia
| | - Erjia Guan
- Department of Materials Science and Engineering University of California Davis CA 95616 USA
| | - Tao Ma
- Department of Chemical Engineering University of California Davis CA 95616 USA
| | | | - Samy Ould‐Chikh
- University of Science and Technology 4700 King Abdullah Thuwal 23955-6900 Kingdom of Saudi Arabia
| | - Luigi Cavallo
- University of Science and Technology 4700 King Abdullah Thuwal 23955-6900 Kingdom of Saudi Arabia
| | - Bruce C. Gates
- Department of Chemical Engineering University of California Davis CA 95616 USA
| | - Jean‐Marie Basset
- University of Science and Technology 4700 King Abdullah Thuwal 23955-6900 Kingdom of Saudi Arabia
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Werghi B, Bendjeriou-Sedjerari A, Jedidi A, Abou-Hamad E, Cavallo L, Basset JM. Single-Site Tetracoordinated Aluminum Hydride Supported on Mesoporous Silica. From Dream to Reality! Organometallics 2016. [DOI: 10.1021/acs.organomet.6b00454] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Baraa Werghi
- King Abdullah University of Science and Technology (KAUST), KAUST Catalysis Center (KCC), Thuwal 23955-6900, Saudi Arabia
| | - Anissa Bendjeriou-Sedjerari
- King Abdullah University of Science and Technology (KAUST), KAUST Catalysis Center (KCC), Thuwal 23955-6900, Saudi Arabia
| | - Abdesslem Jedidi
- King Abdullah University of Science and Technology (KAUST), KAUST Catalysis Center (KCC), Thuwal 23955-6900, Saudi Arabia
| | - Edy Abou-Hamad
- King Abdullah University of Science and Technology (KAUST), KAUST Catalysis Center (KCC), Thuwal 23955-6900, Saudi Arabia
| | - Luigi Cavallo
- King Abdullah University of Science and Technology (KAUST), KAUST Catalysis Center (KCC), Thuwal 23955-6900, Saudi Arabia
| | - Jean-Marie Basset
- King Abdullah University of Science and Technology (KAUST), KAUST Catalysis Center (KCC), Thuwal 23955-6900, Saudi Arabia
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Werghi B, Bendjeriou-Sedjerari A, Sofack-Kreutzer J, Jedidi A, Abou-Hamad E, Cavallo L, Basset JM. Well-defined silica supported aluminum hydride: another step towards the utopian single site dream? Chem Sci 2015; 6:5456-5465. [PMID: 28757945 PMCID: PMC5505125 DOI: 10.1039/c5sc02276b] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2015] [Accepted: 07/17/2015] [Indexed: 11/27/2022] Open
Abstract
Reaction of triisobutylaluminum with SBA15700 at room temperature occurs by two parallel pathways involving either silanol or siloxane bridges.
Reaction of triisobutylaluminum with SBA15700 at room temperature occurs by two parallel pathways involving either silanol or siloxane bridges. It leads to the formation of a well-defined bipodal [(
Created by potrace 1.16, written by Peter Selinger 2001-2019
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SiO)2Al–CH2CH(CH3)2] 1a, silicon isobutyl [Si–CH2CH(CH3)2] 1b and a silicon hydride [Si–H] 1c. Their structural identity was characterized by FT-IR and advanced solid-state NMR spectroscopies (1H, 13C, 29Si, 27Al and 2D multiple quantum), elemental and gas phase analysis, and DFT calculations. The reaction involves the formation of a highly reactive monopodal intermediate: [SiO–Al–[CH2CH(CH3)2]2], with evolution of isobutane. This intermediate undergoes two parallel routes: transfer of either one isobutyl fragment or of one hydride to an adjacent silicon atom. Both processes occur by opening of a strained siloxane bridge, Si–O–Si but with two different mechanisms, showing that the reality of “single site” catalyst may be an utopia: DFT calculations indicate that isobutyl transfer occurs via a simple metathesis between the Al-isobutyl and O–Si bonds, while hydride transfer occurs via a two steps mechanism, the first one is a β-H elimination to Al with elimination of isobutene, whereas the second is a metathesis step between the formed Al–H bond and a O–Si bond. Thermal treatment of 1a (at 250 °C) under high vacuum (10–5 mbar) generates Al–H through a β-H elimination of isobutyl fragment. These supported well-defined Al–H which are highly stable with time, are tetra, penta and octa coordinated as demonstrated by IR and 27Al–1H J-HMQC NMR spectroscopy. All these observations indicate that surfaces atoms around the site of grafting play a considerable role in the reactivity of a single site system.
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Affiliation(s)
- Baraa Werghi
- KAUST Catalysis Center (KCC , ) , King Abdullah University of Science and Technology , Thuwal-23955-6900 , Saudi Arabia . ;
| | - Anissa Bendjeriou-Sedjerari
- KAUST Catalysis Center (KCC , ) , King Abdullah University of Science and Technology , Thuwal-23955-6900 , Saudi Arabia . ;
| | - Julien Sofack-Kreutzer
- KAUST Catalysis Center (KCC , ) , King Abdullah University of Science and Technology , Thuwal-23955-6900 , Saudi Arabia . ;
| | - Abdesslem Jedidi
- KAUST Catalysis Center (KCC , ) , King Abdullah University of Science and Technology , Thuwal-23955-6900 , Saudi Arabia . ;
| | - Edy Abou-Hamad
- KAUST Catalysis Center (KCC , ) , King Abdullah University of Science and Technology , Thuwal-23955-6900 , Saudi Arabia . ;
| | - Luigi Cavallo
- KAUST Catalysis Center (KCC , ) , King Abdullah University of Science and Technology , Thuwal-23955-6900 , Saudi Arabia . ;
| | - Jean-Marie Basset
- KAUST Catalysis Center (KCC , ) , King Abdullah University of Science and Technology , Thuwal-23955-6900 , Saudi Arabia . ;
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Use of the reordering/resolvation of alkyl-modified silica to characterize the microscopic heterogeneity of silica via liquid chromatography. J Chromatogr A 1991. [DOI: 10.1016/s0021-9673(01)96238-7] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Toxin detection using capacitance measurements on immunospecies grafted onto a semiconductor substrate. Anal Chim Acta 1991. [DOI: 10.1016/s0003-2670(00)83008-1] [Citation(s) in RCA: 56] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Duvault-Herrera Y, Jaffrezic-Renault N, Clechet P, Serpinet J, Morel D. Quantitative study of the hydroxylation and of the chemical grafting of oxidized porous silicon. ACTA ACUST UNITED AC 1990. [DOI: 10.1016/0166-6622(90)80263-4] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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