Two New Borates Made of [B5O6(OH)4]− and [B5O10(OH)]6− Clusters, Accompanying a Novel In Situ Organic Reaction

Synthesis, XRD Studies and NLO Properties of [p-H2NC6H4CH2NH3][B5O6(OH)4]·1/2H2O and NLO Properties of Some Related Pentaborate(1−) Salts

“…This is not the case for 1 where the water molecules link between pentaborate(1-) anions and form part of the giant network (rather than as a cavity filler) resulting in a unique structure. Bond lengths and bond angles within the boroxole rings of the pentaborates are within ranges commonly seen in other pentaborate(1-) salts [4,5,[7][8][9][10][11][12][13][24][25][26] and in related boroxole containing systems [27][28][29]. Some summary data are given in the legend to Fig.…”

Recent advances in crystalline hydrated borates with non-metal or transition-metal complex cations

“…The majority of compounds described in this review have been prepared in aqueous solution by simply mixing reactants [10,[16][17][18][19]25,27,31,[39][40][41][43][44][45]48,50,52,54,56,59,62,75,87,93,95,96,100] or by use of hydrothermal [20,22,26,28,30,32,34,37,47,53,57,[63][64][65][70][71][72]79,82,84,102,115] or solvothermal [35,3...…”

“…However, the  acceptor site configuration is particularly common and two variants of this configuration, both with C(8) -interactions, have been described [43,76,77]. These structures are referred to as 'herringbone' [35,36,[38][39][40][41]43,48,57] or 'brickwall' [37,41,43,45,52,75] (Figure 7). A third  configuration, in which the -interactions are R2 2 (12) (reciprocal-), has also been observed [18,48,64,69,70].…”

“…The most thoroughly investigated property of polyborate salts is their thermal (TGA/DSC) behaviour [10,18,20,21,24,34,39,41,43,45,48,53,[56][57][58][59][60]63,65,66,70,74,78,81,83,95,99,100,108,115] [98], then this water is lost at low temperature (<150 o C) prior to dehydration of the polyborate [40,59]. In many cases the materials are reported to char and intumesce prior to collapsing down to a glassy solid [17,18,43,45,56,98].…”

Syntheses, structures and optical properties of two B3O7 cluster-based borates

“…24–28 Under this synthetic system, the high temperature and pressure of the reaction environments facilitate the formation of metastable state species that are hard to obtain in other synthetic systems, including oxoboron clusters with unique configurations and organic species. 15,25,29–33 In hydro(solvo)thermal syntheses, the structure-directing agents (SDAs) play important roles in the formation of the structure by host–guest symmetry and charge matching. Commonly used SDAs include organic amines, transition metal complexes (TMCs), chiral metal complexes (CMCs) and inorganic anions.…”