Limits...
Organic – Inorganic Nanostructure Architecture via Directly Capping Fullerenes onto Quantum Dots

View Article: PubMed Central - HTML - PubMed

ABSTRACT

Pcba: A new form of fullerene-capped CdSe nanoparticles (-capped CdSe NPs), using carboxylate ligands with [60]fullerene capping groups that provides an effective synthetic methodology to attach fullerenes noncovalently to CdSe, is presented for usage in nanotechnology and photoelectric fields. Interestingly, either the internal charge transfer or the energy transfer in the hybrid material contributes to photoluminescence (PL) quenching of the CdSe moieties.

No MeSH data available.


a FT-IR spectra on KBr for dropcast samples of PCBA (diamond), CdSe NPs (asterisk), PCBA-CdSe NPs (circle); b TEM of pyridine-capped CdSe NPs and c PCBA-CdSe NPs.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
getmorefigures.php?uid=PMC3211288&req=5

Figure 2: a FT-IR spectra on KBr for dropcast samples of PCBA (diamond), CdSe NPs (asterisk), PCBA-CdSe NPs (circle); b TEM of pyridine-capped CdSe NPs and c PCBA-CdSe NPs.

Mentions: To ensure that the ligand exchanges had successfully gone to completion, the NPs were characterized by FT-IR (Figure 2). On a low-energy region (from 1,800 to 1,500 cm-1), the FT-IR spectrum of the pristine PCBA, displays a strong absorption band at 1,705 cm-1 assigned to the carboxylic acid, which is not present in the pyridine-capped CdSe NPs. In contrast, the PCBA-capped CdSe NPs reveal somewhat similar to the PCBA; however, it appears that the carboxylic acid band is diminished and shifted to lower energy at 1,730 cm-1 with a relatively decrease in intensity. The inspection of FT-IR of the PCBA-capped CdSe NPs such as the disappearance of the carboxylic acid band and new broad bands around 1,570 cm-1 is clearly suggestive that carboxylate binding are formed between PCBA and CdSe through the ligand exchange reaction.


Organic – Inorganic Nanostructure Architecture via Directly Capping Fullerenes onto Quantum Dots
a FT-IR spectra on KBr for dropcast samples of PCBA (diamond), CdSe NPs (asterisk), PCBA-CdSe NPs (circle); b TEM of pyridine-capped CdSe NPs and c PCBA-CdSe NPs.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3211288&req=5

Figure 2: a FT-IR spectra on KBr for dropcast samples of PCBA (diamond), CdSe NPs (asterisk), PCBA-CdSe NPs (circle); b TEM of pyridine-capped CdSe NPs and c PCBA-CdSe NPs.
Mentions: To ensure that the ligand exchanges had successfully gone to completion, the NPs were characterized by FT-IR (Figure 2). On a low-energy region (from 1,800 to 1,500 cm-1), the FT-IR spectrum of the pristine PCBA, displays a strong absorption band at 1,705 cm-1 assigned to the carboxylic acid, which is not present in the pyridine-capped CdSe NPs. In contrast, the PCBA-capped CdSe NPs reveal somewhat similar to the PCBA; however, it appears that the carboxylic acid band is diminished and shifted to lower energy at 1,730 cm-1 with a relatively decrease in intensity. The inspection of FT-IR of the PCBA-capped CdSe NPs such as the disappearance of the carboxylic acid band and new broad bands around 1,570 cm-1 is clearly suggestive that carboxylate binding are formed between PCBA and CdSe through the ligand exchange reaction.

View Article: PubMed Central - HTML - PubMed

ABSTRACT

Pcba: A new form of fullerene-capped CdSe nanoparticles (-capped CdSe NPs), using carboxylate ligands with [60]fullerene capping groups that provides an effective synthetic methodology to attach fullerenes noncovalently to CdSe, is presented for usage in nanotechnology and photoelectric fields. Interestingly, either the internal charge transfer or the energy transfer in the hybrid material contributes to photoluminescence (PL) quenching of the CdSe moieties.

No MeSH data available.