A molecular tectonics–crystal engineering approach for building organic–inorganic composites. Potential application to the growth control of hydroxyapatite crystals

2003 ◽  
Vol 13 (10) ◽  
pp. 2521-2524 ◽  
Author(s):  
Jean-Marc Planeix ◽  
Wojciech Jaunky ◽  
Thierry Duhoo ◽  
Jan T. Czernuszka ◽  
Mir Wais Hosseini ◽  
...  
Keyword(s):  
Crystal Engineering ◽  
Potential Application ◽  
Growth Control ◽  
Molecular Tectonics ◽  
Engineering Approach ◽  
Inorganic Composites ◽  
Hydroxyapatite Crystals

scholarly journals Crystal Engineering Approach for Fabrication of Inverted Perovskite Solar Cell in Ambient Conditions

Energies ◽  
2021 ◽  
Vol 14 (6) ◽  
pp. 1751
Author(s):  
Inga Ermanova ◽  
Narges Yaghoobi Nia ◽  
Enrico Lamanna ◽  
Elisabetta Di Bartolomeo ◽  
Evgeny Kolesnikov ◽  
...  
Keyword(s):  
Solar Cell ◽  
Crystal Engineering ◽  
High Performance ◽  
Perovskite Solar Cells ◽  
Perovskite Solar Cell ◽  
Layer By Layer ◽  
Ambient Conditions ◽  
Sequential Method ◽  
Engineering Approach ◽  
Hole Transporting

In this paper, we demonstrate the high potentialities of pristine single-cation and mixed cation/anion perovskite solar cells (PSC) fabricated by sequential method deposition in p-i-n planar architecture (ITO/NiOX/Perovskite/PCBM/BCP/Ag) in ambient conditions. We applied the crystal engineering approach for perovskite deposition to control the quality and crystallinity of the light-harvesting film. The formation of a full converted and uniform perovskite absorber layer from poriferous pre-film on a planar hole transporting layer (HTL) is one of the crucial factors for the fabrication of high-performance PSCs. We show that the in-air sequential deposited MAPbI3-based PSCs on planar nickel oxide (NiOX) permitted to obtain a Power Conversion Efficiency (PCE) exceeding 14% while the (FA,MA,Cs)Pb(I,Br)3-based PSC achieved 15.6%. In this paper we also compared the influence of transporting layers on the cell performance by testing material depositions quantity and thickness (for hole transporting layer), and conditions of deposition processes (for electron transporting layer). Moreover, we optimized second step of perovskite deposition by varying the dipping time of substrates into the MA(I,Br) solution. We have shown that the layer by layer deposition of the NiOx is the key point to improve the efficiency for inverted perovskite solar cell out of glove-box using sequential deposition method, increasing the relative efficiency of +26% with respect to reference cells.

Supramolecular single-stranded calix[4]arene helices—towards a crystal engineering approach of homochiral assemblies

CrystEngComm ◽  
2011 ◽  
Vol 13 (12) ◽  
pp. 3979 ◽  
Author(s):  
Michael Mastalerz ◽  
Hebert Jesus Estevez Rivera ◽  
Iris M. Oppel ◽  
Gerald Dyker
Keyword(s):  
Crystal Engineering ◽  
Engineering Approach

Molecular tectonics — Use of urethanes and ureas derived from tetraphenylmethane and tetraphenylsilane to build porous chiral hydrogen-bonded networks

2004 ◽  
Vol 82 (2) ◽  
pp. 386-398 ◽  
Author(s):  
Dominic Laliberté ◽  
Thierry Maris ◽  
James D Wuest
Keyword(s):  
Hydrogen Bonding ◽  
Asymmetric Catalysis ◽  
Crystal Engineering ◽  
Three Dimensional ◽  
Enantiomerically Pure ◽  
X Ray ◽  
Molecular Tectonics ◽  
X Ray Crystallography ◽  
Open Networks ◽  
Hydrogen Bonded

Tetraphenylmethane, tetraphenylsilane, and simple derivatives with substituents that do not engage in hydrogen bonding typically crystallize as close-packed structures with essentially no space available for the inclusion of guests. In contrast, derivatives with hydrogen-bonding groups are known to favor the formation of open networks that include significant amounts of guests. To explore this phenomenon, we synthesized six new derivatives 5a–5e and 6a of tetraphenylmethane and tetraphenylsilane with urethane and urea groups at the para positions, crystallized the compounds, and determined their structures by X-ray crystallography. As expected, all six compounds crystallize to form porous three-dimensional hydrogen-bonded networks. In the case of tetraurea 5e, 66% of the volume of the crystals is accessible to guests, and guests can be exchanged in single crystals without loss of crystallinity. Of special note are: (i) the use of tetrakis(4-isocyanatophenyl)methane (1f) as a precursor for making enantiomerically pure tetraurethanes and tetraureas, including compounds 5b, 5c; and (ii) their subsequent crystallization to give porous chiral hydrogen-bonded networks. Such materials promise to include chiral guests enantioselectively and to be useful in the separation of racemates, asymmetric catalysis, and other applications.Key words: crystal engineering, molecular tectonics, hydrogen bonding, networks, porosity, urethanes, ureas, tetraphenylmethane, tetraphenylsilane.

scholarly journals Molecular tectonics: crystal engineering of mixed valence Fe(ii)/Fe(iii) solid solutions

2010 ◽  
Vol 46 (6) ◽  
pp. 868-870 ◽  
Author(s):  
Pierre Dechambenoit ◽  
Sylvie Ferlay ◽  
Nathalie Kyritsakas ◽  
Mir Wais Hosseini
Keyword(s):  
Solid Solutions ◽  
Crystal Engineering ◽  
Mixed Valence ◽  
Molecular Tectonics

Molecular Tectonics:  Abiotic Control of Hydroxyapatite Crystals Morphology

2002 ◽  
Vol 2 (6) ◽  
pp. 489-492 ◽  
Author(s):  
Vincent Ball ◽  
Jean-Marc Planeix ◽  
Olivier Félix ◽  
Joseph Hemmerlé ◽  
Pierre Schaaf ◽  
...  
Keyword(s):  
Molecular Tectonics ◽  
Abiotic Control ◽  
Hydroxyapatite Crystals
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