scholarly journals Isostructural rubidium and caesium 4-(3,5-dinitropyrazol-4-yl)-3,5-dinitropyrazolates: crystal engineering with polynitro energetic species

2021 ◽  
Vol 77 (11) ◽  
Author(s):  
Kostiantyn V. Domasevitch ◽  
Vira V. Ponomarova
Keyword(s):  
Crystal Engineering ◽  
Self Assembly ◽  
Energetic Materials ◽  
Lone Pair ◽  
The Self ◽  
Two Dimensional ◽  
Modular Construction ◽  
Dipole Interactions ◽  
Hirshfeld Surfaces ◽  
Counter Ions

In the structures of the title salts, poly[[μ4-4-(3,5-dinitropyrazol-4-yl)-3,5-dinitropyrazol-1-ido]rubidium], [Rb(C6HN8O8)] n , (1), and its isostructural caesium analogue [Cs(C6HN8O8) n , (2), two independent cations M1 and M2 (M = Rb, Cs) are situated on a crystallographic twofold axis and on a center of inversion, respectively. Mutual intermolecular hydrogen bonding between the conjugate 3,5-dinitopyrazole NH-donor and 3,5-dinitropyrazole N-acceptor sites of the anions [N...N = 2.785 (2) Å for (1) and 2.832 (3) Å for (2)] governs the self-assembly of the translation-related anions in a predictable fashion. Such one-component modular construction of the organic subtopology supports the utility of the crystal-engineering approach towards designing the structures of polynitro energetic materials. The anionic chains are further linked by multiple ion–dipole interactions involving the 12-coordinate cations bonded to two pyrazole N-atoms [Rb—N = 3.1285 (16), 3.2261 (16) Å; Cs—N = 3.369 (2), 3.401 (2) Å] and all of the eight nitro O-atoms [Rb—O = 2.8543 (15)–3.6985 (16) Å; Cs—O = 3.071 (2)–3.811 (2) Å]. The resulting ionic networks follow the CsCl topological archetype, with either metal or organic ions residing in an environment of eight counter-ions. Weak lone pair–π-hole interactions [pyrazole-N atoms to NO2 groups; N...N = 2.990 (3)–3.198 (3) Å] are also relevant to the packing. The Hirshfeld surfaces and percentage two-dimensional fingerprint plots for (1) and (2) are described.

scholarly journals Regulating the reactivity of black phosphorus via protective chemistry

2020 ◽  
Vol 6 (46) ◽  
pp. eabb4359
Author(s):  
Xiao Liu ◽  
Liangping Xiao ◽  
Jian Weng ◽  
Qingchi Xu ◽  
Wanli Li ◽  
...  
Keyword(s):  
Electron Density ◽  
Self Assembly ◽  
Lone Pair ◽  
High Reactivity ◽  
Black Phosphorus ◽  
The Self ◽  
Two Dimensional ◽  
Inorganic Nanomaterials ◽  
Resistant Layer ◽  
Lone Pair Electrons

Rationally regulating the reactivity of molecules or functional groups is common in organic chemistry, both in laboratory and industry synthesis. This concept can be applied to inorganic nanomaterials, particularly two-dimensional black phosphorus (BP) nanosheets. The high reactivity of few-layer (even monolayer) BP is expected to be “shut down” when not required and to be resumed upon application. Here, we demonstrate a protective chemistry–based methodology for regulating BP reactivity. The protective step initiates from binding Al3+ with lone pair electrons from P to decrease the electron density on the BP surface, and ends with an oxygen/water-resistant layer through the self-assembly of hydrophobic 1,2-benzenedithiol (BDT) on BP/Al3+. This protective step yields a stabilized BP with low reactivity. Deprotection of the obtained BP/Al3+/BDT is achieved by chelator treatment, which removes Al3+ and BDT from the BP surface. The deprotective process recovers the electron density of BP and thus restores the reactivity of BP.

Self-assembled atomically thin hybrid conjugated polymer perovskites with two-dimensional structure

2018 ◽  
Vol 6 (31) ◽  
pp. 8405-8410 ◽  
Author(s):  
Furkan H. Isikgor ◽  
Chilla Damodara Reddy ◽  
Mengsha Li ◽  
Hikmet Coskun ◽  
Bichen Li ◽  
...  
Keyword(s):  
Self Assembly ◽  
Conjugated Polymer ◽  
The Self ◽  
Dimensional Structure ◽  
Two Dimensional ◽  
Self Assembled

2D hybrid perovskites are formed through the self assembly of polyaniline with PbI6 octahedra.

Two-dimensional (2D) self-assembly of oligo(phenylene-ethynylene) molecules and their triangular platinum(ii) diimine complexes studied using STM

2017 ◽  
Vol 19 (46) ◽  
pp. 31284-31289 ◽  
Author(s):  
Siqi Zhang ◽  
Yanfang Geng ◽  
Yuanpeng Fan ◽  
Wubiao Duan ◽  
Ke Deng ◽  
...  
Keyword(s):  
Self Assembly ◽  
Scanning Tunneling Microscope ◽  
The Self ◽  
Scanning Tunneling ◽  
Two Dimensional ◽  
Phenylene Ethynylene ◽  
Tunneling Microscope ◽  
Diimine Complexes

The self-assembly of a series of cyclic oligo(phenylene-ethynylene) (OPE) molecules and their triangular Pt(ii) diimine complexes were studied using scanning tunneling microscope (STM).

Effect of the annealing time on the self-assembly of two-dimensional DNA crystals

2013 ◽  
Vol 58 (15) ◽  
pp. 1450-1455
Author(s):  
ChangLong LIU ◽  
ZhiYong SHEN ◽  
Ming ZHOU ◽  
LiZhou ZHUANG ◽  
George AMOAKO ◽  
...  
Keyword(s):  
Annealing Time ◽  
Self Assembly ◽  
The Self ◽  
Two Dimensional ◽  
Dna Crystals

Two side chains, three supramolecules: exploration of fluorenone derivatives towards crystal engineering

2017 ◽  
Vol 19 (29) ◽  
pp. 19205-19216 ◽  
Author(s):  
Yi Hu ◽  
Kai Miao ◽  
Li Xu ◽  
Bao Zha ◽  
Mengying Long ◽  
...  
Keyword(s):  
Chain Length ◽  
Crystal Engineering ◽  
Self Assembly ◽  
The Self ◽  
Side Chains ◽  
Length Effect ◽  
Alkyl Chains

We explored the chain length effect on inducing the self-assembly of diverse structures by tiny modification of the alkyl chains.

Poly[di-μ-aqua-μ-1,2-bis(pyridin-4-yl)ethene-κ2N:N′-tetrakis(4-iodobenzoato-κ2O,O′)dicadmium]

2011 ◽  
Vol 68 (1) ◽  
pp. m21-m23 ◽  
Author(s):  
Dong Liu ◽  
Ni-Ya Li
Keyword(s):  
Self Assembly ◽  
Title Compound ◽  
The Self ◽  
Dimensional Structure ◽  
Water Molecules ◽  
Two Dimensional ◽  
Coordination Environment ◽  
Iodobenzoic Acid

Colourless crystals of the title compound, [Cd2(C7H4IO2)4(C12H10N2)(H2O)2]n, were obtained by the self-assembly of Cd(NO3)2·4H2O, 1,2-bis(pyridin-4-yl)ethene (bpe) and 4-iodobenzoic acid (4-IBA). Each CdIIatom is seven-coordinated in a pentagonal–bipyramidal coordination environment by four carboxylate O atoms from two different 4-IBA ligands, two O atoms from two water molecules and one N atom from a bpe ligand. The CdIIcentres are bridged by the aqua molecules and bpe ligands, which lie across centres of inversion, to give a two-dimensional net. Topologically, taking the CdIIatoms as nodes and the μ-aqua and μ-bpe ligands as linkers, the two-dimensional structure can be simplified as a (6,3) network.

scholarly journals Two-dimensional square-grid iron(ii) coordination polymers showing anion-dependent spin crossover behavior

RSC Advances ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 5040-5049 ◽  
Author(s):  
Jong Won Shin ◽  
Ah Rim Jeong ◽  
Jong Hwa Jeong ◽  
Hikaru Zenno ◽  
Shinya Hayami ◽  
...  
Keyword(s):  
Coordination Polymers ◽  
Self Assembly ◽  
Spin Crossover ◽  
Two Dimensional ◽  
Square Grid ◽  
Counter Ions ◽  
Crossover Behavior

Two-dimensional Fe-based coordination polymers with square-grid shapes were prepared by self-assembly and exhibited an interesting spin crossover behavior depending on the coordinated counter ions.

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