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Phys."},{"key":"ref5\/cit5b","doi-asserted-by":"crossref","first-page":"781","DOI":"10.1021\/nl025596y","volume":"2","author":"Reiss P.","year":"2002","journal-title":"Nano Lett."},{"key":"ref5\/cit5c","doi-asserted-by":"crossref","first-page":"2293","DOI":"10.1021\/ja016711u","volume":"124","author":"Wang Y. A.","year":"2002","journal-title":"J. Am. Chem. Soc."},{"key":"ref6\/cit6","doi-asserted-by":"crossref","first-page":"1000","DOI":"10.1021\/cm00031a021","volume":"5","author":"Cao G.","year":"1993","journal-title":"Chem. Mater."},{"key":"ref7\/cit7","unstructured":"Assuming this resonance corresponds to the acidic hydrogen of an octadecylphosphonic acid ligand bound to the nanocrystal accounts for only one hydrogen per 11.5 \u00b1 2% of the octadecylphosphonate moieties. Additional work is required to unequivocally assign this resonance."},{"key":"ref8\/cit8","doi-asserted-by":"crossref","first-page":"305","DOI":"10.1021\/ja0656696","volume":"129","author":"Liu H.","year":"2007","journal-title":"J. Am. Chem. Soc."},{"key":"ref9\/cit9","unstructured":"The reaction of7with CdSe\/ZnS core\u2212shell particles was slower (t1\/2> 12 hr)."},{"key":"ref10\/cit10","unstructured":"The relative integrals of the methylene and methyl resonances (1:17) from the remaining aliphatic chains showed that they are composed of octadecyl chains."},{"key":"ref11\/cit11","unstructured":"Adding8to our nanocrystals resulted in a \u223c5 nm shift of the fluorescence maximum."},{"key":"ref12\/cit12","unstructured":"All reactions of chlorotrimethylsilane with nanoparticles were conducted with 2 equiv relative to the number octadecyl chains in the sample as determined by1H NMR spectroscopy. Addition ofexcesschlorotrimethylsilane results in etching of the CdSe particles, as evidenced by a blue-shifting of their absorption and fluorescence spectra, as well as a decrease in quantum yield of the CdSe\/ZnS core\u2212shell samples."},{"key":"ref13\/cit13a","doi-asserted-by":"crossref","first-page":"2485","DOI":"10.1021\/ic50128a059","volume":"12","author":"Seals R. D.","year":"1973","journal-title":"Inorg. Chem."},{"key":"ref13\/cit13b","doi-asserted-by":"crossref","first-page":"695","DOI":"10.1021\/ic50133a036","volume":"13","author":"Escard J.","year":"1974","journal-title":"Inorg. Chem."},{"key":"ref14\/cit14","doi-asserted-by":"crossref","first-page":"571","DOI":"10.1023\/A:1014246315331","volume":"12","author":"Taylor J.","year":"2001","journal-title":"J. Cluster Sci."},{"key":"ref15\/cit15","unstructured":"A small concentration (<10%) of free surfactant ligands appeared upon the addition of5, that rapidly reached equilibrium. Surprisingly, heating this sample to 100\u2009\u00b0C for 16 h made little difference to these spectra. Further experiments to probe this reaction are underway and will be reported elsewhere."},{"key":"ref16\/cit16","unstructured":"The important resonance structures of the dianionic form of octadecylphosphonic acid anhydride show that this moluecule, unlike6, is not chiral. Similarily, its protonated form shows a single line spectrum as a result of rapid hydrogen ion exchange between the P\u2212OH and P\u2550O functionalities (seeSupporting Information). Similar chemical shifts were reported in ref3a."},{"key":"ref17\/cit17a","doi-asserted-by":"crossref","first-page":"7012","DOI":"10.1021\/jp045352x","volume":"109","author":"Kalyuzhny G.","year":"2005","journal-title":"J. Phys. Chem. 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