Grid, structured

Unlike the automobile-type battery that is quite portable, the stationaiy lead-acid batteries that provide uninterruptible power to hospitals and other important facilities are not. Some may weigh over several tons because of the much heavier grid structure and other features to extend life expectancy and improve deep discharge capabilities. 

Figure 2.14 Example of a grid structure in physical space (left) and in computational space (right).

Flarvey et al. (1995) and Harvey and Rogers (1996) proposed a multiblock impeller-fitted grid structure for dealing with the exact geometry of the impeller. The first of these two papers introduces an approximate steady-state method... 

Solv=MeOH, EtOH and PrOH), and l,4-bis(4-pyridyl-butadiyne) (bpb, n= 0.5, Solv=MeOH). Like the btr derivative, compressed [FeN6] pseudo-octahedral sites define the knots of the square- or rhombus-shaped windows, which constitute the layered grid structure of the three compounds. Stacking of these layers in the crystal defines their most important structural differences, which are determined by the ligand size and crystal packing efficiency. In principle, the 2D grids are organised in a fashion similar to that described for the [Fe(btr)2(NCX)2]-H20 system the parallel layers are alternated so that the iron atoms of one layer lie vertically above and below the centres of the squares formed by the iron atoms of the adjacent layers. 

Other aspects related to the packing of these grid structures, the presence of a multitude of interactions between the tetranuclear cations and the counter-anions not hosted in the cavities, and with the crystallization solvent molecules, are beyond the scope of this discussion. In general all of these solids can be considered as microporous and the anions and solvent molecules located within these pores are normally very disordered. Figure 3.7 shows two selected examples, where channels are formed along the c axis in complexes 49 and 40. In the former, disordered triflate anions located in the channels are drawn in grey. In the second example, the regular... 

Encouraged by the ID polymer tetrameric cage transformation, other possibilities of transforming metal dialkyl phosphates have been investigated. Interesting among the results obtained so far is the transformation of the ID cobalt-dtbp polymer into a 2D polymeric grid structure by reaction with 2 equiv of 4,4-bipyridine in... 

Chart 17. Linear Polymer — 2D Grid Structure Conversion at Room Temperature... 

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