Anion-controlled structural motifs in cadmium coordination polymers: Formation of linear chain versus triple-stranded ladder

Humidity-Induced Structural Transformation in Pseudopolymorph Coordination Polymers

“…CPs are structurally divided into three main categories including one, two, and three dimensions . One-dimensional (1D) CPs are the most widespread group and include diverse structural motifs such as linear, ribbon, zigzag, rotaxane, helical, and ladder. − Because acetate or carboxylate anions are able to accept two unique coordination modes, chelating and chelate-bridging, by using their oxygen atoms, it seems that they have a high ability to form different types of ladder structures. − …”

Synthesis and Single Crystal Structure Characterization of Dinuclear and Polymeric Mixed‐ligand Coordination Compounds of Zinc(II) and Cadmium(II) with the Bridging Ligand 1,2‐Bis(pyridin‐4‐ylmethylene)hydrazine

“…1,2-Bis(pyridin-4-ylmethylene)hydrazine (4-bpmh, Scheme 1) [1] is a neutral multidentate linker containing up to four N-coordination sites. [2,3] 4-bpmh usually plays a role as a long linear bridging ligand via both terminal pyridyl nitrogen atoms in dinuclear, polynuclear coordination compounds, [4,5] multi-dimensional coordination polymers (CPs), [6][7][8][9][10][11][12][13][14][15][16][17][18][19] and porous coordination polymers (PCPs). [20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36][37] Furthermore, it has been observed that 4-bpmh is able to undergo weak interactions to form supramolecular architectures.…”

“…, [7,8] 2D coordination polymers with layered structure in {[Zn(1,3-adaa)(4-bpmh)]} n and {[Cd(1,3-adaa)(4bpmh)]} n , [20] pillared-bilayer structure in {[…”

“…Among these coordination compounds, several structure arrays have been observed and studied: the mononuclear structure in [Cd(C 6 H 12 NOS 2 ) 2 (4‐bpmh) 2 ] [ 2 ] and the dinuclear structure in [Cd(S 2 P(O i Pr) 2 ) 2 (4‐bpmh) 0.5 ] 2 , [ 4 ] 1D coordination polymers with linear chains structure in [Zn 2 (4‐bpmh)(2‐tpc) 4 ] n , [Cd(4‐bpmh) 2 (2‐tpc) 2 ] n , [Cd(4‐bpmh)(NCS) 2 (DMSO) 2 ] n and {[Zn(4‐bpmh)](C 7 H 7 SO 3 ) 2 (C 2 H 5 OH) 2 ] n , [ 6,7,9 ] with zigzag chains structure in [Zn(4‐bpmh)(NO 2 ) 2 ] n , [ 10 ] ladder chains structure in {[Cd 2 (4‐bpmh) 3 (sac) 4 ] · 2CH 2 Cl 2 } n , [ 14 ] step‐ladder chains structure in [Cd(S 2 P(O i Pr) 2 ) 2 (4‐bpmh)] n , [ 4 ] triple and triple‐stranded ladder chains structure in [Zn 6 (4‐bpmh) 3 ( p ‐clba) 6 (μ 3 ‐OH) 4 ]( p ‐clba) 2 · (CH 3 OH), and [Zn 6 (4‐bpmh) 3 ( p ‐brba) 6 (μ 3 ‐OH) 4 ]( p ‐brba) 2 · (CH 3 OH) and {[Cd 3 (4‐bpmh) 3 (OAc) 4 (NCS) 2 (DMSO) 2 ]} n , [ 7,8 ] 2D coordination polymers with layered structure in {[Zn(1,3‐adaa)(4‐bpmh)]} n and {[Cd(1,3‐adaa)(4‐bpmh)]} n , [ 20 ] pillared‐bilayer structure in {[Zn 2 (NH 2 ‐bdc) 2 (4‐bpmh)] · (H 2 O) 4 } n [Cd 2 (isonicotinate) 4 (4‐bpmh)(H 2 O)] n , [ 15,18 ] double‐layered structure in {[Zn(1,3‐bdc)(4‐bpmh)] · 2H 2 O} n , {[Zn 2 (Hnip)(4‐bpmh)(nip) 2 ( μ 3 ‐OH)], [ 16,22 ] 2D interpenetration structure in [Zn 2 (sdb) 2 (4‐bpmh)] · 2DMF, [Cd(4‐bpmh)(3m‐glu)(H 2 O)] · H 2 O, [ 26,28 ] and 3D coordination polymers with pillared‐layer structure in [Zn 3 (cpop) 2 (4‐bpmh)(H 2 O) 2 ] n , [Cd 3 (btc) 2 (4‐bpmh) 2 ], {[Zn(1,4‐pdaa)(4‐bpmh)]} n , [Cd 3 (4‐bpmh) 3 (glu) 2 (H 2 O) 2 ](NO 3 ) 2 · (4‐bpmh) 0.5 · (H 2 O) 8 , [Zn(pim)(4‐bpmh)], [Zn(suc)(4‐bpmh)], [Cd 2 (oba) 2 (4‐bpmh) 2 ] n · (DMF) x , [Zn 2 (oba) 2 (4‐bpmh)] n · (DMF) x , [{Zn(hfipbba)(4‐bpmh) 0.5 } · H 2 O], [Cd(2‐NH 2 ‐bdc)(4‐bpmh) 0.5 ] · DMF · H 2 O} n , [ 17,24,28,29,30,33,35 ] bipillared‐layer interpenetrating structure in [Cd(2‐NH 2 ‐bdc)(4‐bpmh) 0.5 ] · DMF · H 2 O} n , [ 35 ] pillared‐bilayer interpenetrating structure in {[Cd(bdc)(4‐bpmh)]} n · 2 n (H 2 O), {[Cd(2‐NH 2 bdc)(4‐bpmh)]} n · 2 n (H 2 O), [{Cd 2 (fdc) 2 (4‐bpmh) 3 } · 1.5(4‐bpmh) · 2(H 2 O)], [ 21,23 ] 3D interpenetrating structure in [Zn 2 (mfda) 2 (4‐bpmh)] · DMF · H 2 O, [Cd 2 (mfda) 2 (4‐bpmh) 2 ] · DMF · H 2 O, [Zn 2 (efda) 2 (4‐bpmh)] · (DMF) 0.25 , {[Zn 3 (μ 4 ‐bpdc) 3 (4‐bpmh)] · 5DMF} n , {[Zn 2 (μ 4 ‐bpdc) 2 (μ‐bpdb)] · 7DMF} n , and {[Zn(4‐bpmh) 0.5 (terep)](H 2 O)} n [ 19,27,34 ] with assembled 2D bilayers in {[Zn(tbip)(4‐bpmh) 1.5 ] CH 3 OH} n . [ 22 ] In order to figure out the structure of the mentioned organic ligands and their Zn/Cd coordination structures in combination with 4‐bpmh (CCDC reference number), Table S1 has been provided in the Supporting Information.…”

“…The other organic ligands in combination with 4-bpmh in the library of mixed-ligand Zn 2+ or Cd 2+ coordination compounds were: S,SЈ-chelating (2-hydroxyethyl)(propyl)carbamodithioate (S 2 CNR 2 ), [2] S,SЈ-diisopropyldithiophosphato, [4] 2thiophenecarboxylate (2-tpc), [6] para-chlorobenzoate (p-clba), para-bromobenzoate (p-brba), [8] saccharinate (C 7 H 5 NO 3 S, sac), [14] 2-amino-1,4-benzene dicarboxylate (2-NH 2 -1,4bdc), [21,35] 5-amino-1,3-benzene dicarboxylate (5-NH 2 -1,3bdc), [15] 1,3-benzenedicarboxylate (1,3-bdc), terephthalate (terep), [16,21,34] 5-nitroisophthalate (nip), 5-tert-butylisophthalate (tbip), [22] benzene-1,3,5-tri carboxylate (btc), [24] biphenyl-4,4Ј-dicarboxylate (bpdc), [27] isonicotinate (C 6 H 5 NO 2 ), [18] 9,9dimethylfluorene-2,7-dicarboxylate (mfda), 9,9-diethylfluorene-2,7-dicarboxylate (efda), [19] 1,4-phenylene diacetate (1,4-ARTICLE pdaa), 1,3-adamantane diacetate (1,3-adaa), [20] 2,5-furandicarboxylate (fdc), [23] 4,4Ј-sulfonyldibenzoilate (sdb), [26] glutarate (glu), 3-methylglutarate (3m-glu), pimelate (pim), succinate (suc), [28] 4,4Ј-oxybis(benzoilate) (oba), [29,31,32,33] 4-(4carboxyphenoxy)phthalate (cpop), [17] 4,4Ј-(hexaflouroisopropylene)bis(benzoilate) (hfipbba). [30] Among these coordination compounds, several structure arrays have been observed and studied: the mononuclear structure in [Cd(C 6 H 12 NOS 2 ) 2 (4-bpmh) 2 ] [2] and the dinuclear structure in [Cd(S 2 P(OiPr) 2 ) 2 (4-bpmh) 0.5 ] 2 , [4] 1D coordination polymers with linear chains structure in [Zn 2 (4- [6,7,9] with zigzag chains structure in [Zn(4-bpmh)(NO 2 ) 2 ] n , [10] ladder chains structure in {[Cd 2 (4-bpmh) 3 (sac) 4 ]•...…”