Polymorphism of chlorpropamide on liquid-assisted mechanical treatment: choice of liquid and type of mechanical treatment matter
Literature Information
Different types of mechanical treatment (tableting, grinding, milling, etc.) are important technological operations in the pharmaceutical industry. Solid materials are not merely comminuted during such treatment, but can undergo polymorphic transitions and amorphisation. A liquid is often added to the solid sample on purpose, e.g. in order to facilitate comminution. In many cases, liquid is present inadvertently, either as a result of trace solvent following up-stream operations, or sorbed from the atmosphere. This work explores the liquid-assisted mechanical treatment of two metastable forms of a model pharmaceutical compound chlorpropamide (CPA), namely the β- and ε-forms. We investigate the stability of these polymorphs to mechanical treatment in the presence of a series of fluids that have affinity for different fragments of the CPA molecule. In addition to variation in fluids, the effect of different mechanical treatment is explored, employing model shear and restricted impact devices, alongside grinding in a mortar. CPA offers a clear example of the drastically different results of shear and impact on mechanochemical polymorphism, on the importance of the careful selection of solvent for liquid-assisted treatment, and on the possible role of even trace quantities of solvent. Further, this work demonstrates the importance of the starting polymorph in determining the outcome of a mechanochemical process. All of these factors can have notable consequence on the outcome of technological operations that include mechanical treatment.
Related Literature
Size-dependent penetration of carbon dots inside the ferritin nanocages: evidence for the quantum confinement effect in carbon dots
Arpan Bhattacharya, Surajit Chatterjee, Roopali Prajapati, Tushar Kanti Mukherjee
DOI: 10.1039/C5CP00543D
Tuning the optical, electrical and magnetic properties of Ba0.5Sr0.5TixM1−xO3 (BST) nanopowders
Mohamed Mohamed Rashad, Abd El-Hakim Taha Kandil, Mikhael Bechelany
DOI: 10.1039/C5CP00319A
Fabrication of nanoscale heterostructures comprised of graphene-encapsulated gold nanoparticles and semiconducting quantum dots for photocatalysis
Yuan Li
DOI: 10.1039/C5CP00928F
Physical chemistry and membrane properties of two phosphatidylinositol bisphosphate isomers
Yu-Hsiu Wang
DOI: 10.1039/C5CP00862J
Two-dimensional electronic-vibrational spectra: modeling correlated electronic and nuclear motion
F. Terenziani, A. Painelli
DOI: 10.1039/C5CP01485A
Influence of the interface in quantum corrections on the low-temperature resistance of La2/3Sr1/3MnO3 trilayer masking thin films
Yuan Jin, Xiao-Peng Cui, Wei-Hua Han, Shi-Xun Cao, Yu-Ze Gao, Jin-Cang Zhang
DOI: 10.1039/C5CP00842E
Multiwalled carbon nanotube coated polyester fabric as textile based flexible counter electrode for dye sensitized solar cell
Alvira Ayoub Arbab, Kyung Chul Sun, Iftikhar Ali Sahito, Muhammad Bilal Qadir, Sung Hoon Jeong
DOI: 10.1039/C5CP00818B
Competitive excited-state single or double proton transfer mechanisms for bis-2,5-(2-benzoxazolyl)-hydroquinone and its derivatives
Jinfeng Zhao, Junsheng Chen, Jianyong Liu, Mark R. Hoffmann
DOI: 10.1039/C4CP05651E
Observations of probe dependence of the solvation dynamics in ionic liquids
Jens Breffke, Nikolaus P. Ernsting, Mark Maroncelli
DOI: 10.1039/C5CP00814J
A systematic study of metal-supported boron nitride materials for the oxygen reduction reaction
Ralph Koitz
DOI: 10.1039/C5CP01384D
You might also like
What are the main uses of (5-Sulfamoyl-3-pyridinyl)boronic acid (CAS: 951233-61-7)?
(5-Sulfamoyl-3-pyridinyl)boronic acid is primarily used in chemical synthesis, p...
How is Benzyl 2-methyl-2-(methylsulfonyl)-4-pentenoate (CAS: 1942858-50-5) typically synthesized?
Benzyl 2-methyl-2-(methylsulfonyl)-4-pentenoate is typically synthesized via est...
What precautions should be taken when handling 8-Fluoroquinolin-6-ol (CAS: 209353-22-0)?
When handling 8-Fluoroquinolin-6-ol (CAS: 209353-22-0), it is important to use p...
What are the physical and chemical properties of 1,3-Dibromo-5-(2-methyl-2-propanyl)benzene (CAS: 129316-09-2)?
1,3-Dibromo-5-(2-methyl-2-propanyl)benzene (CAS: 129316-09-2) is a crystalline c...
What industries use Ethyl 7-chloro-4-oxo-1-(1,3-thiazol-2-yl)-1,4-dihydro-1,8-naphthyridine-3-carboxylate (CAS: 174726-87-5)?
Ethyl 7-chloro-4-oxo-1-(1,3-thiazol-2-yl)-1,4-dihydro-1,8-naphthyridine-3-carbox...
What precautions should be taken when handling Delta-7-Avenasterol (CAS: 23290-26-8)?
When handling Delta-7-Avenasterol (CAS: 23290-26-8), it is important to wear app...
What precautions should be taken when handling N-({(5R)-3-[3-Fluoro-4-(4-morpholinyl)phenyl]-2-oxo-1,3-oxazolidin-5-yl}methyl)acetamide (CAS: 872992-20-6)?
Proper handling involves the use of personal protective equipment such as gloves...
What precautions should be taken when handling 2-Methyl-2-proanyl 4-[(2-aminophenyl)amino]-1-piperidinecarboxylate (CAS: 79099-00-6)?
When handling 2-Methyl-2-proanyl 4-[(2-aminophenyl)amino]-1-piperidinecarboxylat...
What is N-Methyl-4-chlorobenzylamine hydrochloride (CAS: 65542-24-7)?
N-Methyl-4-chlorobenzylamine hydrochloride (CAS: 65542-24-7) is a organic compou...
Is [2-(Dodecyloxy)ethoxy]acetic acid (CAS: 27306-90-7) safe?
[2-(Dodecyloxy)ethoxy]acetic acid (CAS: 27306-90-7) is generally considered safe...
Source Journal
CrystEngComm

CrystEngComm is the forum for the design and understanding of crystalline materials. We welcome studies on the investigation of molecular behaviour within crystals, control of nucleation and crystal growth, engineering of crystal structures, and construction of crystalline materials with tuneable properties and functions. We publish hypothesis-driven research into… how crystal design affects thermodynamics, phase transitional behaviours, polymorphism, morphology control, solid state reactivity (crystal-crystal solution-crystal, and gas-crystal reactions), optoelectronics, ferroelectric materials, non-linear optics, molecular and bulk magnetism, conductivity and quantum computing, catalysis, absorption and desorption, and mechanical properties. Using Techniques and methods including… Single crystal and powder X-ray, electron, and neutron diffraction, solid-state spectroscopy, spectrometry, and microscopy, modelling and data mining, and empirical, semi-empirical and ab-initio theoretical evaluations. On crystalline and solid-state materials. We particularly welcome work on MOFs, coordination polymers, nanocrystals, host-guest and multi-component molecular materials. We also accept work on peptides and liquid crystals. All papers should involve the use or development of a design or optimisation strategy. Routine structural reports or crystal morphology descriptions, even when combined with an analysis of properties or potential applications, are generally considered to be outside the scope of the journal and are unlikely to be accepted.










![4-[(4-Bromophenyl)sulfonyl]thiomorpholine structure 4-[(4-Bromophenyl)sulfonyl]thiomorpholine structure](https://static.chemtradehub.com/structs/223/223555-81-5-2d67.webp)



