scholarly journals Variation in solvato-, AIE- and mechano-fluorochromic behavior for furanyl and thiophenyl-substituted anthranyl π-conjugates: the role of tiny flanking donor groups

2021 ◽  
Vol 2 (19) ◽  
pp. 6418-6427
Author(s):  
Madhuparna Chakraborty ◽  
Manab Chakravarty
Keyword(s):  
Solid State ◽  
Crucial Role ◽  
Crystal Packing

Thiophene-linked π-conjugate shows better solvatochromic redshift and AIE-features than furan-analog. Yet, furan-linked π-conjugate is a better solid-state emitter with reversible mechanofluorochromic features. Variations in crystal packing play a crucial role in this disparity.

Crucial Role of N···Si Interactions in the Solid-State Coloration of Disilylazobenzenes

2008 ◽  
Vol 73 (21) ◽  
pp. 8244-8249 ◽  
Author(s):  
Masaki Yamamura ◽  
Naokazu Kano ◽  
Takayuki Kawashima ◽  
Tomonari Matsumoto ◽  
Jun Harada ◽  
...  
Keyword(s):  
Solid State ◽  
Crucial Role

Crucial Role of Fluorescence in the Solid-State Thermochromism of Salicylideneanilines

2007 ◽  
Vol 129 (51) ◽  
pp. 16216-16221 ◽  
Author(s):  
Jun Harada ◽  
Toshikatsu Fujiwara ◽  
Keiichiro Ogawa
Keyword(s):  
Solid State ◽  
Crucial Role

Crucial role of Ru⋯H interactions in the crystal packing of ruthenocene and its derivatives

CrystEngComm ◽  
2008 ◽  
Vol 10 (7) ◽  
pp. 827 ◽  
Author(s):  
Alexandra O. Borissova ◽  
Mikhail Yu. Antipin ◽  
Dmirtrii S. Perekalin ◽  
Konstantin A. Lyssenko
Keyword(s):  
Crucial Role ◽  
Crystal Packing

Role of halogen-involved intermolecular interactions and existence of isostructurality in the crystal packing of —CF3 and halogen (Cl or Br or I) substituted benzamides

2018 ◽  
Vol 74 (6) ◽  
pp. 574-591 ◽  
Author(s):  
Pradip Kumar Mondal ◽  
Rahul Shukla ◽  
Subha Biswas ◽  
Deepak Chopra
Keyword(s):  
Solid State ◽  
Intermolecular Interactions ◽  
Crystal Packing ◽  
Noncovalent Interactions ◽  
X Ray Diffraction ◽  
Substituted Benzamides ◽  
Size Type ◽  
Substituted Benzamide ◽  
Van Der Waals Radii

A total of 23 benzamides are obtained through a simple reaction between chloro-/bromo-/iodoaniline and trifluoromethylbenzoyl chloride and characterized using single-crystal X-ray diffraction. Crystal structures of three series of benzamides based on N-chlorophenyl–trifluoromethyl–benzamide (nine compounds), N-bromophenyl–trifluoromethyl–benzamide (six compounds), and N-iodophenyl–trifluoromethyl–benzamide (eight compounds) are prepared to analyse the halogen-mediated noncovalent interactions. The influences of Cl/Br/I and trifluoromethyl substituents on the respective interactions are examined in the presence of a strong N—H...O hydrogen bond. This exercise has resulted in the documentation of frequently occurring supramolecular synthons involving halogen atoms in the crystal packing of benzamide molecules in the solid state. In the present study, a detailed quantitative evaluation has been performed on the nature, energetics, electrostatic contributions, and topological properties of short and directional intermolecular interactions derived from the electron density on halogenated benzamides in the solid state. Besides these, the occurrence of three-, two- and one-dimensional isostructurality in halogen (Cl or Br or I) substituted benzamide analogues is also investigated. A `region of co-existence' involving halogen-based intermolecular interactions in the vicinity of the sum of the van der Waals radii has been identified. Thus, the nature of the halogen (effective size), type of interaction and the packing characteristics via presence of additional interactions establish the subtle, yet important, role of cooperativity in intermolecular interactions in crystal packing.

The Influence of the Axial Ligand on the Solid-State Structures of Pentacoordinate Manganese Tetraphenylporphyrin Complexes

1998 ◽  
Vol 51 (9) ◽  
pp. 853 ◽  
Author(s):  
Peter Turner ◽  
Maxwell J. Gunter ◽  
Brian W. Skelton ◽  
Allan H. White
Keyword(s):  
Solid State ◽  
Metal Ion ◽  
Crystal Packing ◽  
Intrinsic Property ◽  
Axial Ligand ◽  
Ligand Field ◽  
Independent Molecules ◽  
Solid State Structures ◽  
Packing Interactions

The crystal structures of Mn(tpp)(NCO), Mn(tpp)(CH3CO2).0·5C7H8, Mn(tpp)(NCS).0·5C7H8, Mn(tpp)(Br).C7H8, Mn(tpp)(I).C7H8 and the previously reported structures Mn(tpp)(Cl).(CH3)2CO, Mn(tpp)(Cl).C7H8, Mn(tpp)(NO2).C6H6, Mn(tpp)(NO3).2C6H6, Mn(tpp)(OSO3H), Mn(tpp)(H2O).-SO3CF3 and Mn(tpp)(CN).CHCl3 are used to assess the role of the axial anion in the crystal packing of pentacoordinate manganese tetraphenylporphyrin complexes. A comparison of the packing strategies adopted by the toluene solvates suggests that the axial anion can sterically determine the lattice packing motif. Amongst the structures examined, there appears to be a hierarchy of packing strategies led by the elegant ‘slot together’ assembly pattern underpinning the Mn(tpp)(Br).C7H8 and Mn(tpp)(Cl).C7H8 lattices. The metrical parameters that have been used to assess intercomplex interactions in the solid state are shown to be crystal packing sensitive. This is clearly evident in the structure of Mn(tpp)(I).C7H8 which has two crystallographically independent molecules. The displacement of the metal ion from the porphyrin core is determined by the axial ligand field; however, this otherwise intrinsic property is also crystal packing dependent. That is, the iodo ligand field itself is modulated by crystal packing interactions. The isomorphous Mn(tpp)(CH3CO2).0·5C7H8 and Mn(tpp)(NCS).0·5C7H8 structures, which also have two crystallographically independent molecules, indicate that the axial ligand field strength can influence intercomplex interactions in the solid state, by moderating charge donation from the porphyrin to the metal.

Salt gradient driven ion transport in solid-state nanopores: the crucial role of reservoir geometry and size

2016 ◽  
Vol 18 (43) ◽  
pp. 30160-30165 ◽  
Author(s):  
Chih-Yuan Lin ◽  
Fu Chen ◽  
Li-Hsien Yeh ◽  
Jyh-Ping Hsu
Keyword(s):  
Solid State ◽  
Ion Transport ◽  
Crucial Role ◽  
Reservoir Geometry ◽  
Salt Gradient

The crucial influence of the reservoir geometry and size on the salt gradient driven ion transport in solid-state nanopores is unraveled.

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