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Cheng R, Wang S, Moslova K, Mäkilä E, Salonen J, Li J, Hirvonen J, Xia B, Santos HA. Quantitative Analysis of Porous Silicon Nanoparticles Functionalization by 1H NMR. ACS Biomater Sci Eng 2021; 8:4132-4139. [PMID: 34292713 PMCID: PMC9554871 DOI: 10.1021/acsbiomaterials.1c00440] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
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Porous silicon (PSi)
nanoparticles have been applied in various
fields, such as catalysis, imaging, and biomedical applications, because
of their large specific surface area, easily modifiable surface chemistry,
biocompatibility, and biodegradability. For biomedical applications,
it is important to precisely control the surface modification of PSi-based
materials and quantify the functionalization density, which determines
the nanoparticle’s behavior in the biological system. Therefore,
we propose here an optimized solution to quantify the functionalization
groups on PSi, based on the nuclear magnetic resonance (NMR) method
by combining the hydrolysis with standard 1H NMR experiments.
We optimized the hydrolysis conditions to degrade the PSi, providing
mobility to the molecules for NMR detection. The NMR parameters were
also optimized by relaxation delay and the number of scans to provide
reliable NMR spectra. With an internal standard, we quantitatively
analyzed the surficial amine groups and their sequential modification
of polyethylene glycol. Our investigation provides a reliable, fast,
and straightforward method in quantitative analysis of the surficial
modification characterization of PSi requiring a small amount of sample.
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Affiliation(s)
- Ruoyu Cheng
- Drug Research Program, Division of Pharmaceutical Chemistry and Technology, Faculty of Pharmacy, University of Helsinki, Helsinki FI-00014, Finland
| | - Shiqi Wang
- Drug Research Program, Division of Pharmaceutical Chemistry and Technology, Faculty of Pharmacy, University of Helsinki, Helsinki FI-00014, Finland
| | - Karina Moslova
- Department of Chemistry, Faculty of Science, University of Helsinki, Helsinki FI-00014, Finland
| | - Ermei Mäkilä
- Laboratory of Industrial Physics, Department of Physics and Astronomy, University of Turku, Turku FI-20014, Finland
| | - Jarno Salonen
- Laboratory of Industrial Physics, Department of Physics and Astronomy, University of Turku, Turku FI-20014, Finland
| | - Jiachen Li
- Drug Research Program, Division of Pharmaceutical Chemistry and Technology, Faculty of Pharmacy, University of Helsinki, Helsinki FI-00014, Finland.,College of Science Key Laboratory of Forest Genetics & Biotechnology (Ministry of Education of China), Nanjing Forestry University, Nanjing 210037, P. R. China
| | - Jouni Hirvonen
- Drug Research Program, Division of Pharmaceutical Chemistry and Technology, Faculty of Pharmacy, University of Helsinki, Helsinki FI-00014, Finland
| | - Bing Xia
- College of Science Key Laboratory of Forest Genetics & Biotechnology (Ministry of Education of China), Nanjing Forestry University, Nanjing 210037, P. R. China
| | - Hélder A Santos
- Drug Research Program, Division of Pharmaceutical Chemistry and Technology, Faculty of Pharmacy, University of Helsinki, Helsinki FI-00014, Finland.,Helsinki Insititute of Life Science, HiLIFE, University of Helsinki, Helsinki FI-00014, Finland
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Sizov AS, Agina EV, Ponomarenko SA. Self-assembled interface monolayers for organic and hybrid electronics. RUSSIAN CHEMICAL REVIEWS 2019. [DOI: 10.1070/rcr4897] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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