Surfactant behaviour of metallacarboranes. A study based on the electrolysis of water

Abstract

should not produce self-assembling motifs, as it is the case.[B12H12] 2-has an aqueous behaviour similar to SO4 2-.

Stealth Amphiphiles: Self-Assembly of Polyhedral Boron Clusters

“…For Na[CoD], it has been observe and described several times, 16-24 but it has not been expected for other boranes. 24 Nevertheless, an accumulation near the water-air interface and surface activity is anticipated for large anions in the literature. 61 We measured the surface tension, γ, 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 15 drop method (shown in Figure 6).…”

“…[16][17][18][19][20][21][22][23][24] Mechanism of formation of small aggregates (sometimes called "micelles") 20 has been already extensively studied, and it obeys the closed association model with critical aggregation concentration, CAC. 23 To reveal a mechanism of the aggregation, NMR spectroscopy is a suitable method.…”

“…25 According to the former approach, boron clusters without C-H groups like dodecaborate should not aggregate in water, and such compounds are predicted to be non-surface active, non-amphiphilic and non-hydrotropic behaving in similar way like SO 4 2-anion in aqueous solutions. 24 In this communication, we will show that this rule fails for anionic closo-boranes and that self-assembly, amphiphilicity and surface activity are common features of anionic Here, we should emphasize that boron-containing molecules have received growing attention in recent years, and some of them are already used in medical applications. [37][38][39][40][41] The bestknown example is BSH, which is used clinically as boron delivery agent in BNCT for treatment of cancers.…”

Icosahedral boron clusters: a perfect tool for the enhancement of polymer features

“…Moreover, the reactivity of polymer (79) with Lewis bases, such as 2,2 0 -bipyrimidine, leads to the formation of a new hybrid polymer [Mn(1-CH 3 -2-CO 2 -1,2-closo-C 2 B 10 H 10 ) 2 (bpm)] n (81) (Fig. 52 Single-crystal X-ray analyses show a spiral chain where each carborane moiety serves as a ligand for two europium atoms, and each Eu 2+ ion is Z 6 -bonded to one C 2 B 10 9 }] n (85) compound. Magnetic measurements show weak antiferromagnetic interactions between the Mn atoms in all cases.…”

“…The reaction of [Me 2 Si(C9 H 5 C 2 H 2 OMe)(C 2 B 10 H 10 )]Li 2 (OEt 2 ) 2 with an equimolar amount of SmI 2 in THF results in the isolation of the polymer [{[Z 5 :s-Me 2 Si(C 9 H 5 CH 2 CH 2 OMe)(C 2 B 10 H 10 )] 2 Sm}-{Li(THF)}] n (82). 51 Compound (82) is a coordination polymer with Li(THF) as a linkage connecting two anionic [{[Z 5 : s-Me 2 Si(C 9 H 5 CH 2 CH 2 -OMe)(C 2 B 10 H 10 )}] 2 Sm] À fragments via the…”