The infrared spectra of arylboron dihalides

Butcher, F.K.; Gerrard, W.; Howarth, Mark; Mooney, E.F.; Willis, H.A.

doi:10.1016/0371-1951(63)80177-0

Cited by 14 publications

(3 citation statements)

References 11 publications

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“…The ATR-FTIR spectrum of SWNT–ph 1 –Bpin exhibited the absorption bands at 2960 and 1370 cm –1 arising from the aliphatic C–H and B–phenyl stretchings, respectively (Figure S2). These results corroborate the successful graft of phenylpinacolborane groups onto sidewalls of SWNTs. Then, Suzuki coupling reaction between SWNT–ph 1 –Bpin and the porphyrin derivatives bearing oligo( p -phenylene) with a bromo group at the terminal (ZnP–ph n –1 –Br), afforded the porphyrin-linked SWNTs through the oligo( p -phenylene) bridge (ZnP–ph n –SWNT, n = 1–5).…”

Section: Resultssupporting

confidence: 81%

“…The ATR-FTIR spectrum of SWNT−ph 1 −Bpin exhibited the absorption bands at 2960 and 1370 cm −1 arising from the aliphatic C−H and B− phenyl stretchings, respectively (Figure S2). 44 To estimate the degree of the porphyrin functionalization by Suzuki couplings on the SWNT sidewall of SWNT−ph 1 −Bpin, the percentage of zinc atom in ZnP−ph n −SWNT and ZnP− xy n−1 −ph 1 −SWNT (n = 1−5) (0.19−0.24%) was also determined by XPS (Figures S1 and S3). The reaction yield of Suzuki coupling was calculated to be 12−14%.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

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Long-Range Observation of Exciplex Formation and Decay Mediated by One-Dimensional Bridges

et al. 2017

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We report herein unprecedented long-range observation of both formation and decay of the exciplex state in donor (D)−bridge (B)−acceptor (A) linked systems. Zinc porphyrins (ZnP) as a donor were tethered to single-walled carbon nanotube (SWNT) as an acceptor through oligo(pphenylene)s (ZnP−ph n −SWNT) or oligo(p-xylene)s (ZnP− xy n−1 −ph 1 −SWNT) with systematically varied lengths (n = 1− 5) to address the issue. Exponential dependencies of rate constants for the exciplex formation (k FEX ) and decay (k DEX ) on the edge-to-edge separation distance between ZnP and SWNT through the bridges were unambiguously derived from timeresolved spectroscopies. Distance dependencies (i.e., attenuation factor, β) of k FEX and k DEX in ZnP−ph n −SWNT were found to be considerably small (β = 0.10 for k FEX and 0.12 Å −1 for k DEX ) compared to those for charge separation and recombination (0.2−0.8 Å −1 ) in D−B−A systems with the same oligo(p-phenylene) bridges. The small β values may be associated with the exciplex state with mixed characters of charge-transfer and excited states. In parallel, the substantially nonconjugated bridge of oligo(p-xylene)s exhibited larger attenuation values (β = 0.12 for k FEX and 0.14 Å −1 for k DEX ). These results provide deep insight into the unique photodynamics of electronically strongly coupled D−B−A systems involving exciplex.

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Section: Resultssupporting

confidence: 81%

Section: ■ Results and Discussionmentioning

confidence: 99%

Long-Range Observation of Exciplex Formation and Decay Mediated by One-Dimensional Bridges

et al. 2017

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“…However, in the six-membered ring system, arguments have been given for assigning a band at 549cm-1 to the B-Cl stretching mode,s in accord with the analogous assignments of Lindemann and Wilson7 at 696cm-1 in BF&l and of Lehmann, Onak and Shapiro 8 at 642cm-1 in (CH30)zBCl. Gerrard and coworkers have preferred a B-C1 assignment close to 900 cm-1.99 10 The approach to the above problems which is reported here was to compute the vibrational frequencies and modes of specific molecules, in particular compounds I and 11 and some related systems, using a modified valence force field transferred from related molecules and to compare calculated and observed transition frequencies.…”

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confidence: 99%