Journal ArticleDOI
Using terahertz time-domain spectroscopical technique to monitor cocrystal formation between piracetam and 2,5-dihydroxybenzoic acid
TLDR
The results indicate that THz-TDS technology can absolutely offer a high potential method to identify and characterize the formed cocrystals, and provide the rich information about their reaction dynamic process involving two or more molecular crystals in situ to better know the corresponding reaction mechanism in pharmaceutical fields.About:
This article is published in Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy.The article was published on 2013-07-01. It has received 41 citations till now. The article focuses on the topics: Cocrystal & Absorption spectroscopy.read more
Citations
More filters
Journal ArticleDOI
Mechanochemistry for Organic Chemists: An Update
Davin Tan,Tomislav Friščić +1 more
TL;DR: A brief overview of recent advances in the use of mechanochemical techniques for the synthesis of organic molecules and materials can be found in this paper, where the authors highlight selected examples from mechanochemical organic transformations and mechanistic studies, and especially those that illustrate chemical reactions or syntheses of molecular targets.
Journal ArticleDOI
Introductory Lecture: Mechanochemistry, a versatile synthesis strategy for new materials
William Jones,Mark D. Eddleston +1 more
TL;DR: This paper overviews the broad areas of application of mechanochemistry, some key features which make it a particularly attractive approach to materials synthesis and some mechanistic aspects highlighted within the literature.
Journal ArticleDOI
Spectroscopic investigation on cocrystal formation between adenine and fumaric acid based on infrared and Raman techniques.
TL;DR: The experimental results show that the cocrystal formed between adenine and fumaric acid possesses unique spectroscopical characteristic compared with that of starting materials, and the characteristic bands corresponding to bending and stretching vibrations of amino and carbonyl groups within cocystal are shifted into lower frequencies upon cocrystals formation.
Journal ArticleDOI
Raman and terahertz spectroscopical investigation of cocrystal formation process of piracetam and 3-hydroxybenzoic acid
TL;DR: The cocrystal of piracetam and 3-hydroxybenzoic acid under grinding condition has been characterized by terahertz spectroscopical technique and results show that the vibrational modes of the cocystal are different from those of the corresponding parent materials.
Journal ArticleDOI
Characteristics of Low-Frequency Molecular Phonon Modes Studied by THz Spectroscopy and Solid-State ab Initio Theory: Polymorphs I and III of Diflunisal.
TL;DR: Although the spectral features are different, these low-frequency phonon modes of the two molecular polymorphs have similar vibrational characteristics in terms of harmonic couplings of intermolecular and intramolecular vibrations.
References
More filters
Journal ArticleDOI
Mechanochemistry: opportunities for new and cleaner synthesis
Stuart L. James,Christopher J. Adams,Carsten Bolm,Dario Braga,Paul Collier,Tomislav Friščić,Fabrizia Grepioni,Kenneth D. M. Harris,Geoff Hyett,William Jones,Anke Krebs,James Mack,Lucia Maini,A. Guy Orpen,Ivan P. Parkin,William C. Shearouse,Jonathan W. Steed,Daniel C. Waddell +17 more
TL;DR: Concentrating on recent advances, this article covers industrial aspects, inorganic materials, organic synthesis, cocrystallisation, pharmaceutical aspects, metal complexes, supramolecular aspects and characterization methods.
Journal ArticleDOI
Collective vibrational modes in biological molecules investigated by terahertz time-domain spectroscopy
TL;DR: Well-resolved absorption spectra of biological molecules in the far-IR (FIR) spectral region recorded by terahertz time-domain spectroscopy (THz-TDS), which can provide a direct fingerprint of the molecular structure or conformational state of a compound.
Journal ArticleDOI
Applying hot-stage microscopy to co-crystal screening: a study of nicotinamide with seven active pharmaceutical ingredients
David J. Berry,Colin C. Seaton,William Clegg,Ross W. Harrington,Simon J. Coles,Peter N. Horton,Michael B. Hursthouse,Richard Storey,William Jones,Tomislav Friščić,Nicholas Blagden +10 more
TL;DR: In this paper, a low-to medium-throughput approach, encompassing both a melt and solution crystallization step as a route to the identification of co-crystals, was reported.
Journal ArticleDOI
THz time domain spectroscopy of biomolecular conformational modes
TL;DR: The measured absorbances of terahertz time domain spectroscopy of several biomolecular systems are compared and it is found that the TTDS absorbance reflects the density of normal modes determined by molecular mechanics calculations, and is sensitive to both conformation and mutation.
Journal ArticleDOI
Applications of Terahertz Spectroscopy in Biosystems
TL;DR: Detailed investigations have uncovered the photo- and hydration-induced conformational flexibility of proteins, the solvent shell depth of the water/biomolecule boundary layers and the solvent reorientation dynamics occurring in these interfacial layers that occur on sub-picosecond time scales.