Tunable Interlayer Distance via Adsorption of Cyclic Hydrocarbons in SCSC Mode

Abstract

Self-assembly of Cd­(NO3)2 with a new C 2-symmetric multidentate N-donor ligand, N,N′-((1,1′-(anthracene-9,10-diylbis­(methylene))­bis­(1H-1,2,3-triazole-4,1-diyl))­bis­(methylene))­bis­(1-(pyridin-3-yl)-N-(pyridin-3-ylmethyl)­methanamine) (L), gives rise to crystals of two-dimensional (2D) frameworks (sql), 4C4H8O2@[Cd­(NO3)2L], with available interlayer open space occupied by solvate 1,4-dioxane molecules. The interlayer distance between the 2D frameworks can be modulated via adsorption of various cyclic hydrocarbons in the single-crystal to single-crystal mode. In this mode, the 1,4-dioxane solvate molecules were, in the present study, replaced for adsorption of benzene, 1,4-dioxane, anisole, trans-decalin, 1,4-benzodioxane, and 1,5-cyclooctadiene. This crystal system, furthermore, could be useful as an efficient and tolerant crystalline matrix for molecular-structure determination of a wide range of cyclic hydrocarbons.

Advances in 2D coordination networks for single‐crystal‐to‐single‐crystal applications beyond confined pores

“…2D networks of sql {4 4 ˑ6 2 } Reaction of Cd(NO 3 ) 2 with a C 2 -symmetric multi N-donor ligand, N,N 0 -((1,1 0 -(anthracene-9,10-diylbis(methylene)) bis(1H-1,2,3-triazole-4,1-diyl))bis(methylene))bis(1-(pyridin-3-yl)-N-(pyridin-3-ylmethyl)methanamine) (L), gives unique 2D networks of 4C 4 H 8 O 2 @[Cd(NO 3 ) 2 L], as shown in Scheme 6. 69 Thus, the self-assembly of Cd(II) cations with Ls gives rise to a 2D framework consisting of both 20-and 58-membered metalla-macrocycles. The 2D frameworks were arrayed in the ABAB ÁÁÁ mode, giving a layer distance of 9.40 Å.…”

“…Our recent results indicate that 2D coordination networks are integral to the following task-specific applications such as template for 3D structures of liquid chemicals, template of energy-transfer materials adsorption, solvomorphism materials, separation of xylene isomers, oxidation catalysts, recognition of cyclic compounds, sensing of unstable diiodomethane, recognition of chiral amino acids, and role of solvate in dimension expansion in SCSC mode. [62][63][64][65][66][67][68][69][70][71][72] Whereas researching on the functional behaviors within 2D pores have been published, [73][74][75][76][77][78] the corresponding SCSC specific applications are rare. In this context, we have explored the efficient SCSC applications beyond the molecular open channels.…”

Subtle metal(ii) effects of 2D coordination networks on SCSC guest exchange

“…Reversible adsorption/desorption of target molecules into porous materials is an essential practical process for storage, recognition, separation, extraction, proton transfer, heterogeneous catalysis, and energy transfer [1][2][3][4][5][6][7][8][9][10][11][12][13] in the singlecrystal-to-single-crystal (SCSC) mode. [13][14][15][16][17][18][19][20][21] Such burgeoning and important applications of novel open-channel coordination-network crystals have motivated many chemists over the past two decades. [22][23][24][25] For example, for observation of new confined-space chemistry applications including molecular separating functions via reversible adsorption/ desorption, various permeable metal-organic frameworks have been designed and constructed via self-assembly of metal ions as angular components incorporating donor ligands as appropriate spacers.…”

“…43,44 And certainly, the sliding and stretching of 2D coordination networks are known to be useful as applied to the porous template of liquidcrystal structures, separation of xylene isomers, dye-inclusion platforms as an energy-transfer system, polymorphism materials, efficient heterogeneous catalysts, sensing via interlayer-tuning, recognition and reservoirs of unstable diiodomethane, and chiral recognition in the SCSC mode. [16][17][18][19][20][21]45 In this context, advanced 2D multi-channel crystalline matrices for convenient SCSC guest exchange were selfassembled and scrutinized. The 2D metal-organic coordination ensemble's pores are efficient, practical, reproducible, tolerant and porous matrices for molecular sieving as well as adsorption/desorption of a wide range of guest molecules.…”

“…43,44 And certainly, the sliding and stretching of 2D coordination networks are known to be useful as applied to the porous template of liquid-crystal structures, separation of xylene isomers, dye-inclusion platforms as an energy-transfer system, polymorphism materials, efficient heterogeneous catalysts, sensing via interlayer-tuning, recognition and reservoirs of unstable diiodomethane, and chiral recognition in the SCSC mode. 16–21,45…”