Addition/Correction pubs.acs.org/JPCC
Cite This: J. Phys. Chem. C XXXX, XXX, XXX−XXX
Correction to “How Do Intermolecular Interactions Affect Swelling of Polyketones with a Differing Number of Carbonyl Groups? An In Situ ATR-FTIR Spectroscopic Study of CO2 Sorption in Polymers” Andrew V. Ewing, Anton A. Gabrienko, Sergey V. Semikolenov, Konstantin A. Dubkov, and Sergei G. Kazarian* J. Phys. Chem. C 2015, 119 (1), 431−440. DOI: 10.1021/jp510208e The following calculation error has been identified in the results of our paper. The correct swelling (S) data were used, but an error was made in the units meaning that the calculations performed to determine cw by eq 8 were incorrect by 1 order of magnitude. Therefore, the concentration of sorbed and interacting CO2 obtained for a series of the polyketone samples will be affected. Accurately estimated concentrations are given in the corrected Figures 7 and 10 which should replace Figures 7 and 10, respectively, in the original publication. cw =
cV ·(1 + S) ρ
(8) Figure 10. Correlation between the concentrations of carbonyl groups and interacting CO2 for the polyketone samples 2S−9S. The spectra were measured at 25 °C and 100 bar, and the concentrations of interacting CO2 were assessed from the absorbance of the ν3 band at 2337 cm−1.
of the linear correlation in the corrected Figure 10. Therefore, the phrase from our original paper “approximately 86 and 77% of all carbonyl groups presented in the polyketones 7S and 8S are available to form a complex with CO2 molecules” should be corrected to “approximately 81 and 77% of carbonyl groups expected to be capable of interaction with CO2 are available to form a complex with CO2 molecules”. Figure 7. Correlation between the varying concentration of carbonyl groups in the polyketones and the concentration of adsorbed CO2 by the polyketone samples 1S−9S (measured at 25 °C and 100 bar and calculated from the ν3 band of CO2 at 2335 cm−1).
The error affects some of the discussion but not the conclusions or main observations of our work. Thus, “ca. 0.0073 mol·g−1” and “86 and 77%” on page 437 (right column) should be “ca. 0.00051 mol·g−1” and “81 and 77%”, respectively. Taking into account corrected data, the ratio of sorbed CO2 and carbonyl groups of the polyketones equals 1:2 (CO2:C O) and not “approximately one order of magnitude higher than the concentration of carbonyl groups” as it is stated in the original paper. Similarly, the ratio of interacting CO2 and carbonyl groups is approximately 1:8 and not 2:1. The corrected data does not support our proposition of possible formation of 1:2 complexes between carbonyl groups and CO2. The results of the corrected CO2 concentration suggest that many carbonyl groups in the polymer chain do not interact with CO2. However, the presence of interactions between some polymer carbonyl groups and CO2 are confirmed on the basis © XXXX American Chemical Society
A
DOI: 10.1021/acs.jpcc.8b01160 J. Phys. Chem. C XXXX, XXX, XXX−XXX
