Are Low-Coordinating Anions of Interest as Doping Agents in Organic Conducting Polymers?

Masalles, C.; Borrós, Salvador; Viñas, Clara; Teixidor, Francesç

doi:10.1002/1521-4095(200008)12:16<1199::aid-adma1199>3.0.co;2-w

Cited by 92 publications

(113 citation statements)

References 2 publications

Supporting

Mentioning

109

Contrasting

Order By: Relevance

“…3 These sandwich anions open the way for a vast field of applications such as remediation of nuclear wastes, 4 conducting organic polymers, 5 ion selective electrodes 6 or enzyme inhibitors 7 among others. However, their derivative chemistry remains very much unexplored.…”

Section: Introductionmentioning

confidence: 99%

The effect of a paramagnetic metal ion within a molecule: comparison of the structurally identical paramagnetic [3,3-Fe(1,2-C₂B₉H₁₁)₂]⁻ with the diamagnetic [3,3-Co(1,2-C₂B₉H₁₁)₂]⁻ sandwich complexes

2015

View full text Add to dashboard Cite

Derivatives of the ferrabisdicarbollide [3,3'-Fe(1,2-C(2)B(9)H(11))(2)](-) have been produced starting from the zwitterion [3,3'-Fe(8-(OCH(2)CH(2))(2)-1,2-C(2)B(9)H(10))(1',2'-C(2)B(9)H(11))], 1, upon reaction with nucleophiles: alkoxides, halides and hydrosulfide ions HS(-). The result has been the preparation of [3,3'-Fe(8-(OCH(2)CH(2))(2)R/X-1,2-C(2)B(9)H(10))(1',2'-C(2)B(9)H(11))] (R = OMe, [2](-); OEt, [3](-); OCH(2)CH(2)OCH(3), [4](-); and X = Cl, [5](-); Br, [6](-); I, [7](-); and SH, [8](-)). The reaction behavior of is comparable to the well-studied cobalt equivalent, [3,3'-Co(8-(OCH(2)CH(2))2-1,2-C(2)B(9)H(10))(1',2'-C(2)B(9)H(11))], and the yields and stability of the resulting complexes are similar. These results are relevant taking into account that [3,3'-Fe(1,2-C(2)B(9)H(11))(2))(-) is a paramagnetic anion. Implications of this are observed in the (11)B-, (1)H and (13)C NMR spectra of [3,3'-Co(1,2-C(2)B(9)H(11))(2)](-) and [3,3'-Fe(1,2-C(2)B(9)H(11))(2)](-) that having identical sandwich molecular structures and the same negative charge have absolutely different widths of the NMR field, between 15 and -25 ppm for [3,3'-Co(1,2-C(2)B(9)H(11))(2)](-) and in the range 150 to -550 ppm for [3,3'-Fe(1,2-C(2)B(9)H(11))(2)](-). The sharpness of both spectra is on the other hand comparable, although no B-H couplings are observed in the Fe metallacarborane or its derivatives. Remarkable is the comparative influence vs. [3,3'-Co(1,2-C(2)B(9)H(11))(2)](-) of replacing Co by Fe on the elements of the cluster layer nearest to the metal. The two equivalent C cluster (Cc) atoms are influenced at 36 840 Hz, the two equivalent B atoms that are adjacent to the two Cc are influenced at 38 157 Hz and the single B that is adjacent to the two B atoms is influenced at 44 062 Hz. Remarkable is the similar influence on B and on C, taking into account that the values have been obtained from two distinct NMR spectra of (11)B and (13)C. The {(11)B-(11)B} COSY NMR and {(1)H-(11)B} HETEROCOSY NMR spectra of [3,3'-Fe(1,2-C(2)B(9)H(11)(2)](-) have been obtained and are reported for the first time.

show abstract

Section: Introductionmentioning

confidence: 99%

The effect of a paramagnetic metal ion within a molecule: comparison of the structurally identical paramagnetic [3,3-Fe(1,2-C₂B₉H₁₁)₂]⁻ with the diamagnetic [3,3-Co(1,2-C₂B₉H₁₁)₂]⁻ sandwich complexes

2015

View full text Add to dashboard Cite

show abstract

“…This microsensor is fabricated on needle shaped silicon probes [31], and is based on the use of a novel conducting polymer polypyrrole doped with anion [3,3′-Co(1,2-C 2 B 9 H 11 ) 2 ] − (See Fig. 1) [31][32][33] acting as the mediating layer between platinum and a poly(vinylchloride) (PVC) membrane incorporating the hydrogen selective ionophore tri-n-dodecylamine (TDDA).…”

Section: Introductionmentioning

confidence: 99%

All-solid-state hydrogen sensing microelectrodes based on novel PPy[3,3′-Co(1,2-C2B9H11)2] as a solid internal contact

Zine

Bausells

Teixidor

et al. 2006

Materials Science and Engineering: C

Self Cite

View full text Add to dashboard Cite

“…The cobaltabis(dicarbollide) anion has high chemical resistance [12,13,14] and, as we have described [15], the carborane-doped material has major advantages over common dopant anions. The high boron content in the deposited film, about 40% [15] of total atoms, results in a very high overoxidation resistance [15], preventing OH -attack on the polymeric chain. The use of such a high-volume anion with low charge density also prevents the dopant-anion exchange observed in alkaline media [6,16,17].…”

Section: Introductionmentioning

confidence: 99%

Simple PVC–PPy electrode for pH measurement and titrations

et al. 2002

Self Cite

View full text Add to dashboard Cite

Cobaltabis(dicarbollide) [3,3'-Co(1,2-C2B9H11)](-)-doped polypyrrole (PPy) films have been prepared galvanostatically on glassy carbon electrodes in acetonitrile solution. The potential response behavior of the film of this new material has been investigated in some common pH buffers and in acid-base titrations. The potentiometric characteristics of the resulting films are indicative of a quasi-Nernstian response (approximately 50 mV/pH unit), a linearity range from pH 12 to 3 and correlation coefficients (r2) of approximately 0.98. The electrode is suitable for pH measurements and for monoprotic titrations of strong alkalis with strong acids, and weak bases with strong acids, but the long response time hinders the use of this electrode for multiprotic titrations. The time response has been dramatically improved by reducing the film thickness by using the template effect of a non-conducting polymer (PVC) cast over the graphite surface before PPy deposition. PPy polymerization occurs in the free channels of PVC leading to the formation of PPy wires. The morphological change of PPy does not affect the slope or linearity range. The response of the PVC-PPy electrochemical sensor is rapid and the sensor is easy to prepare, at low cost, and its performance is comparable with that of commercial glass electrodes.

show abstract

Are Low-Coordinating Anions of Interest as Doping Agents in Organic Conducting Polymers?

Cited by 92 publications

References 2 publications

The effect of a paramagnetic metal ion within a molecule: comparison of the structurally identical paramagnetic [3,3-Fe(1,2-C₂B₉H₁₁)₂]⁻ with the diamagnetic [3,3-Co(1,2-C₂B₉H₁₁)₂]⁻ sandwich complexes

The effect of a paramagnetic metal ion within a molecule: comparison of the structurally identical paramagnetic [3,3-Fe(1,2-C₂B₉H₁₁)₂]⁻ with the diamagnetic [3,3-Co(1,2-C₂B₉H₁₁)₂]⁻ sandwich complexes

All-solid-state hydrogen sensing microelectrodes based on novel PPy[3,3′-Co(1,2-C2B9H11)2] as a solid internal contact

Simple PVC–PPy electrode for pH measurement and titrations

Contact Info

Product

Resources

About

Are Low-Coordinating Anions of Interest as Doping Agents in Organic Conducting Polymers?

Cited by 92 publications

References 2 publications

The effect of a paramagnetic metal ion within a molecule: comparison of the structurally identical paramagnetic [3,3-Fe(1,2-C2B9H11)2]− with the diamagnetic [3,3-Co(1,2-C2B9H11)2]− sandwich complexes

The effect of a paramagnetic metal ion within a molecule: comparison of the structurally identical paramagnetic [3,3-Fe(1,2-C2B9H11)2]− with the diamagnetic [3,3-Co(1,2-C2B9H11)2]− sandwich complexes

All-solid-state hydrogen sensing microelectrodes based on novel PPy[3,3′-Co(1,2-C2B9H11)2] as a solid internal contact

Simple PVC–PPy electrode for pH measurement and titrations

Contact Info

Product

Resources

About

The effect of a paramagnetic metal ion within a molecule: comparison of the structurally identical paramagnetic [3,3-Fe(1,2-C₂B₉H₁₁)₂]⁻ with the diamagnetic [3,3-Co(1,2-C₂B₉H₁₁)₂]⁻ sandwich complexes

The effect of a paramagnetic metal ion within a molecule: comparison of the structurally identical paramagnetic [3,3-Fe(1,2-C₂B₉H₁₁)₂]⁻ with the diamagnetic [3,3-Co(1,2-C₂B₉H₁₁)₂]⁻ sandwich complexes