8-hydroxy-l,3,6-pyrenetrisulfonic

Trisodium 8-hydroxy-l,3,6-pyrenetrisulfonate [6358-69-6J M 488.8, m >300(dec). Purified by chromatography with an alumina column, and eluted with -propanol-water (3 1, v/v). Recrystd from aqueous acetone (5 95, v/v) using decolorising charcoal. 

Hydroxy-l,3,6-pyrenetrisulfonic add, trisodium salt [6358-59-6] Cl 59040 Xmax 403 nm, UR2700000 ... 

SWCNTs were modified with several water-soluble pyrene derivatives (1-pyreneacetic acid, 1-pyrenecarboxylic acid, 1-pyrenebutyric acid, and 8-hydroxy-l,3,6-pyrenetrisulfonic acid) bearing negatively charged ionic head-groups, to act as anchors to several pyridium headgroups present in a series of water-soluble metalloporphyrins [MP] + (M = Zn, Co, and Fe) [60a]. Interactions between the metalloporphyrins and SWCNTs proceeded through a combination of associative van der Waals (spacer-CNT) and electrostatic interactions (metalloporphyrins-spacer-CNT), as demonstrated by the combination of spectroscopic and surface techniques. 

Similar classical countercations for the detection of anion antiport in U-tubes do not exist. However, most standard probes including lucigenin (see below) will work for this purpose (unpublished results). Many alternative methods for the detection of U-tube activity are conceivable (ion-selective electrodes, probes, etc). For the transport of charged molecules, standard probes such as 8-hydroxy-l,3,6-pyrenetrisulfonate (HPTS) and 5(6)-carboxyfluorescein (CF) have been used directly to detect anion transport, and p-xylene bis(pyridinium) bromide (DPX), or safranin O has been used to detect cation transport (see below for structures). ... 

Clement, N.R., Gould, J.M. Pyranine (8-hydroxy-l,3,6-pyrenetrisulfonate) as a probe of internal aqueous hydrogen ion concentration in phospholipid vesicles. Biochemistry 20(6), 1534-1538 (1981)... 

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