Role of 4,4′-bipyridine versus longer spacers 4,4′-azobipyridine, 1,2-bis(4-pyridyl)ethylene, and 1,2-bis(pyridin-3-ylmethylene)hydrazine in the formation of thermally labile metallophosphate coordination polymers

Abstract

Uncoordinated N-donors spacers in the title compounds facilitate interesting orthogonal H-bonding, leading to the formation of 3-D polymeric networks.

Photo‐/Electroinduced Irreversible Isomerization of 2,2’‐Azobispyridine Ligands in Arene Ruthenium(II) Complexes

“…It is also a wellknown ligand for metal center, [1] with resulting complexes used as magnetic resonance imaging probes, [2] cytotoxic agents against cancer cell, [3][4][5] or as building components in switchable materials. [6][7][8][9][10] The ligand properties of azobispyridine have been investigated towards a number of metals, such as Cd II , [11][12][13][14][15][16] Cu II , [13,15,17,18] Re I , [19][20][21] Cu I , [13,18,22] Ni II , [13,15,23] Zn II , [15,23] Ru II , [24,25] Ag I , [26,27] Co II , [11,13] Re II and Re V , [21] Pt II , [28] Hg II , [15] Au I , [26] Mn II , [13] W 0 and Os 0 , [29] and Ti II , [30] giving rise to new types of polymer structures involving π-π and π-p stacking of the ligand. [13][14][15]…”

“…[6][7][8][9][10] The ligand properties of azobispyridine have been investigated towards a number of metals, such as Cd II , [11][12][13][14][15][16] Cu II , [13,15,17,18] Re I , [19][20][21] Cu I , [13,18,22] Ni II , [13,15,23] Zn II , [15,23] Ru II , [24,25] Ag I , [26,27] Co II , [11,13] Re II and Re V , [21] Pt II , [28] Hg II , [15] Au I , [26] Mn II , [13] W 0 and Os 0 , [29] and Ti II , [30] giving rise to new types of polymer structures involving π-π and π-p stacking of the ligand. [13][14][15][16]30] The coordination properties to the metal center are obviously impacted by the position of the nitrogen atom in the pyridine ring of the ligand. Linear patterns such as I and II are most common for 4,4'-and 3-3'-azobispyridine [11][12]…”

Dimensionality Alteration and Intra- versus Inter-SBU Void Encapsulation in Zinc Phosphate Frameworks

“…The use of BIPY as a bridging ligand to form coordination polymers is well established in the literature through more than 6500 crystal structures recorded in the CSD based on BIPY (Figure ). The oxidized and more flexible 4,4′-bipyridine- N , N ′-dioxide (BIPYDO), capable of forming angular coordination bonds because ligation is through oxygen, has emerged as a versatile supramolecular linker in recent times (∼300 hits in the CSD) . The third form, BIPYMO ( 1 ), which combines ligation by a nitrogen sp 2 center and an oxygen center, that is capable of displaying angles from 110 to 160° on the two ends of the same ligand, has been investigated only recently .…”

[Bis(2,6-diisopropylphenyl) phosphato-κO]pentakis(methanol-κO)manganese bis(2,6-diisopropylphenyl) phosphate methanol trisolvate

“…Thus, the number of structures in the Cambridge Structural Database (CSD version 5.38, latest update May 2017; Groom et al, 2016) is limited to 20 (after the exclusion of duplicated structures). These comprise: one mononuclear complex (MOKCEU; Murugavel & Sathiyendiran, 2001); four binuclear complexes [DAVFEM (Shiraishi et al, 2005), ENIMUJ (Yashiro et al, 2003), YIWYUA and YIWZAH (Pothiraja et al, 2014) (Bian et al, 2004;Kuroda-Sowa et al, 2005) and XUBXOH/XUBXOH01 (Kuroda-Sowa et al, 2002]; eight coordination polymers [KOZZAC and KOZZUW (Rajakannu et al, 2015), LULGEE (Sathiyendiran & Murugavel, 2002), ODEWOK (Rafizadeh et al, 2007), SAMNEA/SAMNEA01 (Pothiraja et al, 2004(Pothiraja et al, , 2005, TEKQOR and TEKQUX (Dey et al, 2013) and WENSUE (Rafizadeh et al, 2006)]. All of the above are heteroleptic complexes containing the following di-substituted organophosphate ligands:…”