4,4 -Diaminobiphenyl-2,2 disulfonic

Diaminobiphenyl-2,2 -disulfonic acid Biphenyl-2,2 -disulfonic acid Cu powder added. 188... 

The cage is formed as the unique product of the reaction of 4,4 -diaminobiphenyl-2,2 -disulfonic acid with 2-formylpyridine, iron(II) sulphate and tetramethylammonium hydroxide in an aqueous solution (Fig. 11). These compounds are all commercially available and inexpensive [128]. 

Great attention was paid to the polynaphthalenecarboximides containing sulfonic groups [46-61]. Such polymers which may be used for the preparation of protonoconductive membranes for fuel cells [62-64] are usually prepared by the interaction of DNTA with 4,4 -diaminobiphenyl-2,2 -disulfonic acid or a mixture of this sulfonated monomer with other aromatic diamines (Scheme 1.12). 

As well as 4,4 -diaminobiphenyl-2,2 -disulfonic acid [46-57], diamines such as sulfonated bis-(3-aminophenyl)phenyl phosphine oxide (Figure 1.9) were used for the preparation of sulfonated polyimides [58] ... 

Alkaline fuel cell Atomic force microscopy Atom transfer radical polymerization 4,4 -Diaminobiphenyl 2,2 -disulfonic acid... 

Benzidine, 3,3 -dimethoxy. See Dianisidine Benzidine, 2,2 -disulfo-. See 2,2 -Benzidinedisulfonic acid 2,2 -Benzidinedisulfonic acid CAS 117-61-3 EINECS/ELINCS 204-200-0 Synonyms Benzidine, 2,2 -disulfo- Benzidine-2,2 -disulfonic acid 6,6 -Bimetanilic acid (1,1 -Biphenyl)-2,2 -disulfonic acid, 4,4 -diamino- 2,2 -Biphenyldisulfonic acid, 4,4 -diamino-4,4 -Biphenyldisulfonic acid, 2,2 -diamino- 2,2 -Diamino-4,4 -biphenyldisulfonic acid 4,4 -Diamino-(1,1 -biphenyl)-2,2 -disulfonic acid 4,4 -Diaminobiphenyl-2,2 -disulfonic acid 4,4 -Diaminodiphenyl-2,2 -disulfonic acid 2,2 -Disulfobenzidine 2,2 -Disulfo-4,4 -diaminobiphenyl Empirical C12H12N2O6S2... 

If 5,5 -dimethylbenzidine-2,2 -disulfonic acid (DMBDSA) [59], 2,5-di-aminobenzenesulfonic acid (DABSA) [60], and 4,4 -diaminostilbene-2,2 -di-sulfonic acid (DSDSA) [64] are scarcely used, 4,4 -diaminobiphenyl-2,2 -disulfonic acid (BDSA) has been the most employed in recent years. 

Suda et al. [288] reported the synthesis and characterization of a series of sulfonated star-hb polyimides (S-hb-Pls) without any crosslinking for use as proton exchange membranes. Sulfonated anhydride-terminated polyimides with different molecular weights (M v = 59,000, 200,000 and 300,000 Da) based on monomer combination 1,4,5,8-naphthalene tetracarboxylic dianhydride/4,4 -diaminobiphenyl 2,2 -disulfonic acid (NTDA/BDSA) were synthesized using different molar ratios of BDSA NTDA. The amine-terminated hb-Pl based on monomer combination 4,4-(hexafluoroisopropylidene)diphthalic anhydride/tris(4-aminophenyl)amine (6EDA/TAPA) was also prepared. Scheme 33 shows the monomer combinations used for the preparation of (S-hb-Pl). 

BDSA. See d -Diaminobiphenyl-l -disulfonic acid (BDSA) 3,3,4,4,Bcnzophcnonctctracaiboxylic dianhydride (BTDA), 297 Benzoxazine intermediates, 392 Benzoxazines, 391, 416-417... 

The reaction involves coupling naphthionic acid 39 with diazotised 4,4 -diaminobiphenyl (benzidine, 41) in alkaline solution. The darkness of the shade of the dye may sometimes be increased by the presence of several sulfonic acid groups in the molecule which function as auxochromes. An example is the formation of Cl Acid Black 42, by coupling H-acid (8-amino-1-hydroxynaphtha-lene-3,6-disulfonic acid, 43) with firstly diazotized / -nitroaniline in acid solution, and secondly with diazotized aniline in alkaline solution as shown in Equation 5. 

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