Mechano-responsive luminescent emissions of an organic molecular crystal: effects of aromatic stacking interactions and solid state packing

CrystEngComm ◽  
2019 ◽  
Vol 21 (32) ◽  
pp. 4811-4819 ◽  
Author(s):  
Kakali Devi ◽  
Rupam J. Sarma
Keyword(s):  
Solid State ◽  
Molecular Crystal ◽  
Stacking Interactions ◽  
Aromatic Stacking ◽  
Organic Molecular Crystal

Three polymorphs of 2-hydroxynaphthaldehyde semicarbazone (2-NOH-S) have been identified, and their mechano-responsive luminescent emissions and interconversions are discussed.

scholarly journals Turning on solid-state phosphorescence of platinum acetylides with aromatic stacking

2020 ◽  
Vol 56 (50) ◽  
pp. 6854-6857
Author(s):  
William J. Mullin ◽  
Huan Qin ◽  
Tomoyasu Mani ◽  
Peter Müller ◽  
Matthew J. Panzer ◽  
...  
Keyword(s):  
Solid State ◽  
Stacking Interactions ◽  
Aromatic Stacking

This communication describes a platinum acetylide that phosphoresces as a solid due to programmed aromatic stacking interactions of pendant arenes that prevent intermolecular aggregation.

Advancing the use of Voronoi–Dirichlet polyhedra to describe interactions in organic molecular crystal structures by the example of galunisertib polymorphs

CrystEngComm ◽  
2021 ◽  
Author(s):  
Viktor N. Serezhkin ◽  
Anton V. Savchenkov
Keyword(s):  
Crystal Structures ◽  
Molecular Crystal ◽  
Noncovalent Interactions ◽  
Organic Molecular Crystal ◽  
Universal Approach ◽  
Structure Properties

The universal approach for studying structure/properties relationships shows that every polymorph of galunisertib is characterized with unique noncovalent interactions.

A Chemical Perspective to the Anti-Amyloid Action of Compounds and a Nanoparticle Based Assay for Screening Amyloid Inhibitors

2020 ◽  
Author(s):  
Nidhi Gour ◽  
Bharti Koshti
Keyword(s):  
Memory Loss ◽  
Cost Effective ◽  
Structural Motif ◽  
Rapid Screening ◽  
Stacking Interactions ◽  
Aromatic Rings ◽  
Amyloid Fibers ◽  
Aromatic Stacking ◽  
Cost Effective Technique ◽  
The Brain

Aggregation of amyloid beeta 1-42 (Aβ<sub>42</sub>) peptide causes the formation of clustered deposits knows as amyloid plaques in the brain which leads to neuronal dysfunction and memory loss and associated with many neurological disorders including Alzheimer’s and Parkinson’s. Aβ<sub>42</sub> has core structural motif with phenylalanine at the 19 and 20 positions. The diphenylalanine (FF) residue plays a crucial role in the formation of amyloid fibers and serves as model peptide for studying Aβ<sub>42 </sub>aggregation. FF self-assembles to well-ordered tubular morphology via aromatic pi-pi stackings. Our studies, suggest that the aromatic rings present in the anti-amyloidogenic compounds may interact with the pi-pi stacking interactions present in the FF. Even the compounds which do not have aromatic rings, like cyclodextrin and cucurbituril show anti-amyloid property due to the binding of aromatic ring inside the guest cavity. Hence, our studies also suggest that compounds which may have a functional moiety capable of interacting with the aromatic stacking interactions might be tested for their anti-amyloidogenic properties. Further, in this manuscript, we have proposed two novel nanoparticle based assays for the rapid screening of amyloid inhibitors. In the first assay, interaction between biotin-tagged FF peptide and the streptavidin labelled gold nanoparticles (s-AuNPs) were used. In another assay, thiol-Au interactions were used to develop an assay for detection of amyloid inhibitors. It is envisaged that the proposed analytical method will provide a simple, facile and cost effective technique for the screening of amyloid inhibitors and may be of immense practical implications to find the therapeutic remedies for the diseases associated with the protein aggregation.

X-ray Crystal Structure of Gallium Tris- (8-hydroxyquinoline):  Intermolecular π−π Stacking Interactions in the Solid State

1999 ◽  
Vol 11 (3) ◽  
pp. 530-532 ◽  
Author(s):  
Yue Wang ◽  
Weixing Zhang ◽  
Yanqin Li ◽  
Ling Ye ◽  
Guangdi Yang
Keyword(s):  
Crystal Structure ◽  
Solid State ◽  
Stacking Interactions ◽  
X Ray ◽  
Π Stacking

Pentafluorophenyl Copper–Pyridine Complexes: Synthesis, Supramolecular Structures via Cuprophilic and π-Stacking Interactions, and Solid-State Luminescence

2011 ◽  
Vol 31 (4) ◽  
pp. 1546-1558 ◽  
Author(s):  
Ami Doshi ◽  
Anand Sundararaman ◽  
Krishnan Venkatasubbaiah ◽  
Lev N. Zakharov ◽  
Arnold L. Rheingold ◽  
...  
Keyword(s):  
Solid State ◽  
Supramolecular Structures ◽  
Stacking Interactions ◽  
Pyridine Complexes ◽  
Π Stacking ◽  
State Luminescence

Direct Structure Determination of a Multicomponent Molecular Crystal Prepared by a Solid-State Grinding Procedure

2003 ◽  
Vol 125 (48) ◽  
pp. 14658-14659 ◽  
Author(s):  
Eugene Y. Cheung ◽  
Simon J. Kitchin ◽  
Kenneth D. M. Harris ◽  
Yoshitane Imai ◽  
Nobuo Tajima ◽  
...  
Keyword(s):  
Solid State ◽  
Structure Determination ◽  
Molecular Crystal

scholarly journals Aromatic stacking interactions govern catalysis in aryl-alcohol oxidase

FEBS Journal ◽  
2015 ◽  
Vol 282 (16) ◽  
pp. 3091-3106 ◽  
Author(s):  
Patricia Ferreira ◽  
Aitor Hernández-Ortega ◽  
Fátima Lucas ◽  
Juan Carro ◽  
Beatriz Herguedas ◽  
...  
Keyword(s):  
Alcohol Oxidase ◽  
Stacking Interactions ◽  
Aromatic Stacking

Drastic photoluminescence modulation of an organic molecular crystal with high pressure

2019 ◽  
Vol 3 (8) ◽  
pp. 1510-1517 ◽  
Author(s):  
Junjie Guan ◽  
Chunfang Zhang ◽  
Dexiang Gao ◽  
Xingyu Tang ◽  
Xiao Dong ◽  
...  
Keyword(s):  
Phase Transition ◽  
High Pressure ◽  
Molecular Crystal ◽  
Near Infrared ◽  
Infrared Region ◽  
Photoluminescence Spectra ◽  
Organic Molecular Crystal ◽  
Greenish Yellow ◽  
Near Infrared Region

The pressure-induced phase transition of diphenylfluorenone leads to a drastic redshift of the photoluminescence spectra from greenish-yellow to the near-infrared region.

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