Structural analysis and IR-spectroscopy of a new anilinium hydrogenselenite hybrid compound: A subtle structural phase transition

Role of Bis(triphenylphosphine)iminium Cation [PNP]+ on the Crystal Packing of [PNP]+[HSeO3]− Solvate Salt

“…In the crystal structure of 1-carbamoylguanidinium hydrogen selenate(IV) reported in a previous study [24], strong and short inter-selenate(IV) hydrogen bonds help to fuse molecular layers formed by the planar 1-carbamoylguanidinium ions into double sheets. In the case of the crystal structure of anilinium hydrogen selenate(IV) monohydrate reported in a previous study [23], the crystal packing consists of alternating layers of anilinium cations and hydrogen selenate(IV) anions interconnected by N-H•••O hydrogen bonds. Water molecules are located within the anionic layers and are involved in very strong O-H•••O intermolecular interactions connecting the hydrogen selenate(IV) anions.…”

“…The crystal structure of 1 consists of a bis(triphenylphosphine)iminium cation, a hydrogen selenate(IV) anion, a dichloromethane and a water molecule. The crystal structures of hydrogen selenate(IV) of alkali metals or ammonium have been largely reported in the literature [19][20][21], while relatively few phases containing hydrogen selenate(IV) and organic nitrogen cations have been described until now [22][23][24][25][26][27][28][29]. Some relevant features of the structure of 1 are reported in Figure 1.…”

“…A dichloromethane molecule is also present in the crystal packing, which is involved in interactions with another dichloromethane and with a water molecule through the H atoms. Considering the structures reported in the Cambridge Crystallographic Data Centre that are comprised of hydrogen selenate(IV) anions of nitrogen containing cations, usually a strong network of hydrogen bonds developing in the entire three-dimensional array of the crystal packing is observed [22][23][24][25][26][27][28][29]. For example, the reported crystal structure of the ammonium hydrogen selenate(IV) [19], which is the simplest of this type of compounds, is consolidated by a network of hydrogen bonds, with donor [22], anilinium [23], L-triptophanium [29], 1-carbamoylguanidinium [24], L-argininium [25], N-N -diphenylguanidinium [26], cytosinium [27], and several organoammonium cations described by Lukevics et al [28] separations, these bonds vary in strength from fairly strong to very weak.…”

Hydrogels with Gigantic Thermopower for Low-grade Heat Harvesting

“…Figure 2d shows the peak intensity of this mode in PVA/KI hydrogel is higher than that of the pristine and PVA/KOH hydrogels, indicating that more hydroxyl groups can stretch in PVA/KI hydrogels than in other two samples. Moreover, the absorption peak of PVA/KI is blue-shifted compared with pristine and PVA/KOH hydrogels, indicating weaker hydrogen bonding 31 . This further proves ions can break the hydrogen bonds among PVA chains, with I − ions exhibiting stronger ability for hydrogen bond breaking than OH − ions.…”

Synthesis, structural elucidation, spectroscopic, Hirshfeld surface analysis and theoretical simulation of a new adeninium orthoperiodate (1−) bis(hydrate) organic–inorganic hybrid crystals

“…Organic-inorganic compounds have remarkable and considerable potential for scientific studies and technological applications, owing to their ability to combine useful properties of organic compounds (such as straightforward synthetic approach, structural diversity, easily tailored molecular structure and functional properties) and inorganic systems (such as chemical, thermal and mechanical stabilities) [1][2][3][4]. Organic-inorganic hybrid materials can generate new functionalities from this association [5,6], like magnetic, ferromagnetic and electric properties, semi conductivity and photoluminescence [7][8][9][10][11]. On the other hand, an important part of hybrid materials have been investigated and developed for non-linear optical (NLO) properties and applications [12][13][14][15].…”