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Department of Chemistry

 
Portrait of wj10

Materials Chemistry Group


Functional (pharmaceutical) molecular solids


The design of functional molecular materials has advanced tremendously through cocrystallisation: the assembly of multiple chemical species in the same crystal lattice. Underlying cocrystals formation are rules that guide molecular recognition and self-assembly. We are deciphering this "intermolecular language" by combining experimental work with data mining and molecular modelling. Our particular interest is constructing functional materials through weak supramolecular interactions, such as hydrogen and halogen bonds.



Surface dynamics of molecular solids


Properties of crystalline solids are usually measured as a bulk property, and the results interpreted in terms of crystal structure. However, such a description does not adequately describe the surface of molecular crystals, at which the distribution of forces on a molecule is non-symmetrical, resulting in high mobility and reactivity. The atomic force microscope (AFM) is a unique tool for studying such surface-related dynamics.


 


Teaching


 


Current teaching includes a third year undergraduate lecture course on the Chemistry of Materials.  The course examines a range of organic, metal-organic and inorganic materials and demonstrates their varied uses. We will, in particular, identify important structural features relevant to such areas as the pharmaceutical and petrochemical industries and to naturally occurring biomaterials such as bone. The underlying chemistry and properties will be shown to be often sensitive to the way that the constituent atoms and molecules are packed together. This aspect of solid state control will be examined in some detail.



The development and design of new materials, incorporating structural characteristics of inorganic solids and functionality of organic molecules will be described.



The control of crystal morphology is important in many applications, and this will be discussed in the context of templating crystal growth, both in Nature and in the laboratory, and of crystal engineering. Numerous important materials, including many found in Nature, are in fact inorganic-organic composites, and these will also be discussed in detail.



From paracetamol to petrol to proteins to bone – the importance of the Chemistry of Materials will be explored in these lectures.


Also, as part of the Cambridge fourth year program I teach a course on Organic Solids that builds on the lecture course Chemistry of Materials given in Part II (although it is not required that students have taken this course). The first six lectures of the course, given by me, will cover aspects of crystal chemistry, structure and reactivity of organic solids. Examples of lattice controlled reactions will be given, including photochemical and thermal. Particular emphasis will be placed on how solid state properties impact on the development of drug products in the pharmaceutical industry. Experimental approaches to understanding molecular packing will be described and will lead into the second part of the course, given by my colleague, Dr Graeme Day.

Publications

On the kinetics of solvate formation through mechanochemistry
D Hasa, M Pastore, M Arhangelskis, B Gabriele, AJ Cruz-Cabeza, GS Rauber, AD Bond, W Jones
– CrystEngComm
(2019)
21,
2097
Cocrystal Dissociation under Controlled Humidity: A Case Study of Caffeine-Glutaric Acid Cocrystal Polymorphs
R Thakuria, M Arhangelskis, MD Eddleston, EHH Chow, KK Sarmah, BJ Aldous, JF Krzyzaniak, W Jones
– Organic Process Research and Development
(2019)
23,
845
Multicomponent Crystal Forms of a Biologically Active Hydrazone with Some Dicarboxylic Acids: Salts or Cocrystals?
L Mazur, I Materek, AD Bond, W Jones
– Crystal Growth and Design
(2019)
19,
2663
Time-Dependent Density-Functional Theory for Modeling Solid-State Fluorescence Emission of Organic Multicomponent Crystals.
M Arhangelskis, DB Jochym, L Bernasconi, T Friščić, AJ Morris, W Jones
– The Journal of Physical Chemistry A
(2018)
122,
7514
Crystallization at Solvent Interfaces Enables Access to a Variety of Cocrystal Polymorphs and Hydrates
SJ Diez, MD Eddleston, M Arhangelskis, M Milbled, MJ Mueller, AD Bond, D-K Bucar, W Jones
– CRYSTAL GROWTH & DESIGN
(2018)
18,
3263
Structural studies of crystalline forms of triamterene with carboxylic acid, GRAS and API molecules
A Rehman, A Delori, DS Hughes, W Jones
– International Union of Crystallography Journal
(2018)
5,
309
Using crystallography, topology and graph set analysis for the description of the hydrogen bond network of triamterene: A rational approach to solid form selection
DS Hughes, A Delori, A Rehman, W Jones
– Chemistry Central Journal
(2017)
11,
63
The role of cracks in the crystal nucleation process of amorphous griseofulvin
JF Willart, E Dudognon, A Mahieu, M Eddleston, W Jones, M Descamps
– The European Physical Journal Special Topics
(2017)
226,
837
Crystal effects influencing the course of organic solid state reactions: Perfect, imperfect and surface effects
W Jones
(2017)
PartF1,
145
Mechanochemistry and Its Role in Novel Crystal Form Discovery
W Jones
(2017)
PartF1,
341
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Research Group

Research Interest Groups

Telephone number

01223 336468

Email address

wj10@cam.ac.uk