Crystal structure of a 1,6-bis(phenylethynyl)pyrene-based cyclophane that exhibits mechanochromic luminescence

2021 ◽  
Author(s):  
Shohei Simizu ◽  
Shakkeeb Thazhathethil ◽  
Kiyonori Takahashi ◽  
Takayoshi Nakamura ◽  
Yoshimitsu Sagara
Keyword(s):  
Crystal Structure ◽  
Phase Transitions ◽  
Amorphous Phase ◽  
Photophysical Properties ◽  
Luminescent Materials ◽  
Mechanical Stimuli ◽  
Stimuli Responsive ◽  
Mechanochromic Luminescence

Cyclophanes featuring luminophores are considered promising candidates as thermal or mechanical stimuli-responsive luminescent materials. The mechanism of the changes in the photophysical properties on the crystal-crystal or crystal-amorphous phase transitions...

scholarly journals Luminescent Supramolecular Nano- or Microstructures Formed in Aqueous Media by Amphiphile-Noble Metal Complexes

2020 ◽  
Vol 2020 ◽  
pp. 1-24 ◽  
Author(s):  
Carmen Cretu ◽  
Loredana Maiuolo ◽  
Domenico Lombardo ◽  
Elisabeta I. Szerb ◽  
Pietro Calandra
Keyword(s):  
Noble Metal ◽  
Smart Materials ◽  
Self Assembly ◽  
Noble Metals ◽  
Photophysical Properties ◽  
Aqueous Media ◽  
Molecular Architecture ◽  
Stimuli Responsive ◽  
Panoramic View ◽  
Amphiphilic Molecules

The involvement of metal ions within the self-assembly spontaneously occurring in surfactant-based systems gives additional and interesting features. The electronic states of the metal, together with the bonds that can be established with the organic amphiphilic counterpart, are the factors triggering new photophysical properties. Moreover, the availability of stimuli-responsive supramolecular amphiphile assemblies, able to disassemble in a back-process, provides reversible switching particularly useful in novel approaches and applications giving rise to truly smart materials. In particular, small amphiphiles with an inner distribution, within their molecular architecture, of various polar and apolar functional groups, can give a wide variety of interactions and therefore enriched self-assemblies. If it is joined with the opportune presence and localization of noble metals, whose chemical and photophysical properties are undiscussed, then very interesting materials can be obtained. In this minireview, the basic concepts on self-assembly of small amphiphilic molecules with noble metals are shown with particular reference to the photophysical properties aiming at furnishing to the reader a panoramic view of these exciting problematics. In this respect, the following will be shown: (i) the principles of self-assembly of amphiphiles that involve noble metals, (ii) examples of amphiphiles and amphiphile-noble metal systems as representatives of systems with enhanced photophysical properties, and (iii) final comments and perspectives with some examples of modern applications.

An unexpected dinuclear Cu(II) complex with a bis(Salamo) chelating ligand: synthesis, crystal structure, and photophysical properties

2016 ◽  
Vol 69 (1) ◽  
pp. 149-159 ◽  
Author(s):  
Jian-Chun Ma ◽  
Xiu-Yan Dong ◽  
Wen-Kui Dong ◽  
Yang Zhang ◽  
Li-Chun Zhu ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Photophysical Properties ◽  
Chelating Ligand ◽  
Ligand Synthesis

Crystal structure, compressibility and possible phase transitions in \boldvarepsilon-FeSi studied by first-principles pseudopotential calculations

1999 ◽  
Vol 55 (4) ◽  
pp. 484-493 ◽  
Author(s):  
Lidunka Vočadlo ◽  
Geoffrey D. Price ◽  
I. G. Wood
Keyword(s):  
Crystal Structure ◽  
High Pressure ◽  
Phase Transitions ◽  
First Principles ◽  
Stable Phase ◽  
Third Order ◽  
First Derivative ◽  
Pseudopotential Calculations ◽  
Cscl Type ◽  
Murnaghan Equation

An investigation of the relative stability of the FeSi structure and of some hypothetical polymorphs of FeSi has been made by first-principles pseudopotential calculations. It has been shown that the observed distortion from ideal sevenfold coordination is essential in stabilizing the FeSi structure relative to one of the CsCl type. Application of high pressure to FeSi is predicted to produce a structure having nearly perfect sevenfold coordination. However, it appears that FeSi having a CsCl-type structure will be the thermodynamically most stable phase for pressures greater than 13 GPa. Fitting of the calculated internal energy vs volume for the FeSi structure to a third-order Birch–Murnaghan equation of state led to values, at T = 0 K, for the bulk modulus, K 0, and for its first derivative with respect to pressure, K 0′, of 227 GPa and 3.9, respectively.

Stimuli-Responsive Luminescent Supramolecular Assemblies and Co-assemblies by Orthogonal Dipole-Dipole Interaction and Halogen Bonding

2021 ◽  
Author(s):  
Akshoy Jamadar ◽  
Ajeet Kumar Singh ◽  
Lisa Roy ◽  
Anindita Das
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Structure Analysis ◽  
Halogen Bonding ◽  
Dipole Interaction ◽  
Crystal Structure Analysis ◽  
Supramolecular Assemblies ◽  
Single Crystal Structure ◽  
Stimuli Responsive ◽  
Single Crystal Structure Analysis

This article reports π-chromophore assemblies from three structurally related dipolar naphthalene monoimide (NMI) luminogens (M1, M2 and M3) by underexplored orthogonal dipole-dipole interaction and halogen bonding. Single crystal structure analysis...

The synthesis, crystal structure and photophysical properties of three novel naphthalimide dyes

2009 ◽  
Vol 80 (1) ◽  
pp. 11-16 ◽  
Author(s):  
Wei Jiang ◽  
Jinan Tang ◽  
Qi Qi ◽  
Weibing Wu ◽  
Yueming Sun ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Photophysical Properties
Sign in / Sign up

Export Citation Format

Share Document