Direct Measurement of Molecular Mobility and Crystallisation of Amorphous Pharmaceuticals using Terahertz SpectroscopyReportar como inadecuado


Direct Measurement of Molecular Mobility and Crystallisation of Amorphous Pharmaceuticals using Terahertz Spectroscopy


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Publication Date: 2016-01-07

Journal Title: Advanced Drug Delivery Reviews

Publisher: Elsevier

Language: English

Type: Article

Metadata: Show full item record

Citation: Sibik, J., & Zeitler, J. A. (2016). Direct Measurement of Molecular Mobility and Crystallisation of Amorphous Pharmaceuticals using Terahertz Spectroscopy. Advanced Drug Delivery Reviews

Description: This is the author accepted manuscript. The final version is available from Elsevier via http://dx.doi.org/10.1016/j.addr.2015.12.021

Abstract: Despite much effort in the area, no comprehensive understanding of the formation and behaviour of amorphous solids has yet been achieved. This severely limits the industrial application of such materials, including drug delivery where, in principle, amorphous solids have demonstrated their great usefulness in increasing the bioavailability of poorly aqueous soluble active pharmaceutical ingredients. Terahertz time-domain spectroscopy is a relatively novel analytical technique that can be used to measure the fast molecular dynamics of molecules with high accuracy in a non-contact and non-destructive fashion. Over the past decade a number of applications for the characterisation of amorphous drug molecules and formulations have been developed and it has been demonstrated how this technique can be used to determine the onset and strength in molecular mobility that underpins the crystallisation of amorphous drugs. In this review we provide an overview of the history, fundamentals and future perspective of pharmaceutical applications related to the terahertz dynamics of amorphous systems.

Keywords: terahertz spectroscopy, amorphous, molecular mobility, glass transition, dielectric relaxation, far-infrared, crystallisation, amorphous stability, caged dynamics, Johari-Goldstein β relaxation

Sponsorship: We would like to acknowledge the U.K. Engineering and Physical Sciences Research Council (EP/J007803/1) as well as MedImmune for funding.

Identifiers:

This record's URL: https://www.repository.cam.ac.uk/handle/1810/253142http://dx.doi.org/10.1016/j.addr.2015.12.021

Rights: Attribution-NonCommercial-NoDerivs 2.0 UK: England & Wales

Licence URL: http://creativecommons.org/licenses/by-nc-nd/2.0/uk/





Autor: Sibik, JurajZeitler, J. Axel

Fuente: https://www.repository.cam.ac.uk/handle/1810/253142



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