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Jeong, Yong-Kwang,Lee, Young Min,Yun, Jeonghun,Mazur, Tomasz,Kim, Minju,Kim, Young Jae,Dygas, Miroslaw,Choi, Sun Hee,Kim, Kwang S.,Kwon, Oh-Hoon,Yoon, Seok Min,Grzybowski, Bartosz A. American Chemical Society 2017 JOURNAL OF THE AMERICAN CHEMICAL SOCIETY - Vol.139 No.42
<P>Materials exhibiting excitation-wavelength-dependent photoluminescence, PL, are useful in a range of biomedical and optoelectronic applications. This paper describes a nanoparticulate material whose PL is tunable across the entire visible range and is achieved without adjusting particle size, any postsynthetic doping, or surface modification. A straightforward thermal decomposition of rhenium (VII) oxide precursor yields nanoparticles that comprise Re atoms at different oxidation states. Studies of time-resolved emission spectra and DFT calculations both indicate that tunable PL of such mixed-valence particles originates from the presence of multiple emissive states that become “active” at different excitation wavelengths. In addition, the nanoparticles exhibit photocatalytic activity that, under visible-light irradiation, is superior to that of TiO<SUB>2</SUB> nanomaterials.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/jacsat/2017/jacsat.2017.139.issue-42/jacs.7b07494/production/images/medium/ja-2017-07494q_0006.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/ja7b07494'>ACS Electronic Supporting Info</A></P>