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• W1993006585 endingPage "344011" @default.
• W1993006585 startingPage "344011" @default.
• W1993006585 abstract "The excellent electronic and material properties of single walled carbon nanotubes (SWNTs) makes this nanomaterial very attractive for incorporation into flexible and stretchable electronics. However, the widespread application of SWNTs in electronic devices is still limited. To purify, process and place SWNTs, appropriate solvents for dispersion are needed. However, a fundamental understanding of the reasons why certain solvents are capable of dispersing SWNTs is still missing. Here we report on two new potential solvents containing amidine moieties, 1,8-diazabicycloundec-7-ene (DBU) and 1,5-diazabicyclo(4.3.0)non-5-ene (DBN). Even though these solvents' molecular structures differ by only two -CH(2)- groups, we found that DBU is capable of dispersing SWNTs, while DBN is not. We carried out density functional theory (DFT) calculations to investigate the interaction between DBU and DBN, and we elucidated the reasons for the different performances of the two solvents. DBU has a preferential edge-on interaction with the SWNT, thus allowing for a higher solvent coverage than DBN. In addition, the CH(2)-SWNT interaction present for DBU substantially increases the adsorption energy compared to DBN. Our results point to the important interplay between the interaction of pi electrons, nitrogen lone pairs and the -CH(2)- groups present in aprotic solvent molecules and the delocalized pi electrons in SWNTs." @default.
• W1993006585 created "2016-06-24" @default.
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• W1993006585 date "2012-08-10" @default.
• W1993006585 modified "2023-09-23" @default.
• W1993006585 title "Dispersion of single walled carbon nanotubes in amidine solvents" @default.
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• W1993006585 doi "https://doi.org/10.1088/0957-4484/23/34/344011" @default.
• W1993006585 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/22885377" @default.
• W1993006585 hasPublicationYear "2012" @default.
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