Themed collection Molecular Crystals: Mechanics and Photonics


Tuning thermomechanical properties of hydrogen-bonded materials by using a mixed cocrystal approach
The thermal and thermomechanical behavior of multi-component organic solids is tuned at the molecular level via preparation of mixed cocrystals.
J. Mater. Chem. C, 2025,13, 7918-7923
https://doi.org/10.1039/D5TC00576K
Odd-Even Effect Controls Twist-Elasticity of an Organic Fluorophore in Cocrystals Prepared Using Mechanochemistry
J. Mater. Chem. C, 2025, Accepted Manuscript
https://doi.org/10.1039/D5TC00313J

Enhancing optoelectronic performance of organic phototransistors through surface doping of tetra-bromo perylene diimide single crystals
A novel chiral organic semiconductor (S)-4Br-PDI-Ph was synthesized and self-assembled into single-crystalline nanowires. Aniline surface vapor doping markedly improved their optoelectronic performance in phototransistors.
J. Mater. Chem. C, 2025,13, 8077-8083
https://doi.org/10.1039/D5TC00361J
2D elastic fluorinated donor–acceptor type π-conjugated molecular crystals and their optical crystal–polymer hybrid films
We designed 2D elastic crystals based on asymmetric fluorinated donor–acceptor–donor molecular structures for hybridization with polyimide films, achieving 3D active optical waveguide properties.
J. Mater. Chem. C, 2025, Advance Article
https://doi.org/10.1039/D5TC00790A
Polymorphism-induced multi-functional crystal photonics achieved by a highly luminescent benzofuranyl molecule having tetrafluorophenylene core
J. Mater. Chem. C, 2025, Accepted Manuscript
https://doi.org/10.1039/D5TC00817D
Molecularly thin organic single-crystalline p–n heterojunctions by interfacial heteroepitaxy for high-performance polarization-sensitive photodetectors
An interfacial heteroepitaxy strategy was developed to fabricate molecularly thin, single-crystalline p–n heterojunctions with precise orientation control and their polarization-sensitive photodetection capabilities were explored.
J. Mater. Chem. C, 2025, Advance Article
https://doi.org/10.1039/D5TC00456J
Sustained acid release from stimuli responsive organic crystals facilitates shape modulation in metal nanoparticle synthesis
Stimuli responsive fluorescent materials play an essential role in smart material engineering. We designed molecules that exhibited stimuli responsive luminescence and gradual proton release for the synthesis and passivation of metal nanoparticles.
J. Mater. Chem. C, 2025,13, 7093-7101
https://doi.org/10.1039/D5TC00047E
Flexible organic crystal-quantum dot hybrids with adjustable waveguides
Organic crystals integrate multicolor emissions from semiconductor quantum dots via a modular assembly approach. This modular strategy merges the advantages of quantum dots and organic crystals for versatile photonics.
J. Mater. Chem. C, 2025,13, 6547-6555
https://doi.org/10.1039/D5TC00112A

Tetrabromobenzene-based molecular alloys – a tool for tailoring the temperature of the thermosalient phase transition
The temperature of the thermosalient phase transition can be tuned within a range of 15 °C by varying the TBB content by 8% in the molecular TBB–TCB alloys.
J. Mater. Chem. C, 2025,13, 6539-6546
https://doi.org/10.1039/D4TC04615C

Flexible organic–inorganic hybrid crystals of tin(IV) chloride and naphthalenediimide: exploring elasticity, mechanochromism, and photothermal conversion
OIMHs incorporating NDI cations exhibit flexible deformation under stress and function as mechanochromic and photothermal conversion materials, demonstrating their soft and multifunctional nature.
J. Mater. Chem. C, 2025, Advance Article
https://doi.org/10.1039/D5TC00891C

Intramolecular through-space versus through-bond charge transfer in new donor-carbazole-acceptor type luminophores
New donor-carbazole-acceptor derivatives can exhibit fluorescence in the blue–orange spectral range. The observed emission suggests the involvement of through bond and through space charge transfers.
J. Mater. Chem. C, 2025,13, 6195-6206
https://doi.org/10.1039/D4TC04884A

The impact of dihedral angle in aryl groups on the photocyclization reactivity of inverse-type diarylethenes
Photocyclization reactivity of inverse-type diarylethenes strongly depends on the dihedral angle in aryl groups. Especially, the photocyclization reaction in crystal requires a dihedral angle between the thiophene and phenyl rings greater than 81°.
J. Mater. Chem. C, 2025,13, 5259-5267
https://doi.org/10.1039/D4TC04853A
About this collection
This special collection investigates the extraordinary properties of molecular crystals and their essential role in the management of mechanical and optical energy. It showcases their diverse applications in contemporary scientific and technological domains, such as non-linear optics, sensor technologies, switchable devices, and sophisticated photonic components and circuits.
This collection is guest edited by Prof. Rajadurai Chandrasekar (University of Hyderabad, India),Prof. Panče Naumov(New York University Abu Dhabi), Prof. Xue-Dong Wang(Soochow University),Prof. Kristin Hutchins(University of Missouri).
We hope you enjoy reading about the latest developments in molecular crystals in Journal of Materials Chemistry C.