Color-Tunable and High-Efficiency. Dye-Encapsulated Metal-Organic Framework. (MOF) Composites Used for Smart White

Transcription

1 Supporting Information Color-Tunable and High-Efficiency Dye-Encapsulated Metal-Organic Framework (MOF) Composites Used for Smart White LEDs Wenwei Chen a, Yixi Zhuang a, *, Le Wang b, *, Ying Lv a, Jianbin Liu a, Tian-Liang Zhou a, and Rong-Jun Xie a, * a College of Materials, Xiamen University, Simingnan-Road 422, Xiamen , P. R. China. b College of Optical and Electronic Technology, China Jiliang University, Hangzhou, Zhejiang , China. * zhuangyixi@xmu.edu.cn. * calla@cjlu.edu.cn. * rjxie@xmu.edu.cn. S-1

2 Figure S1. Differential loading behaviors of bio-mof-1 in Rh 110 (a), Rh 123 (b) and Rh 6G (c) solutions with various concentrations. The amount of adsorbent (parent bio-mof-1) in each bottle was 25 mg. Figure S2. Confocal images of Rh in different depths. Excitation wavelength, 543 nm. The uniform dye distribution in the single MOF particle indicates that the dye molecules were dispersed throughout bio-mof-1. S-2

3 Figure S3. Loading test of methyl orange anionic dye in bio-mof-1. The bio-mof-1 powders remained white in color after soaked in the dye solution for 8 h, suggesting that this anionic dye was difficult to enter the MOF channels. Figure S4. (a) Molecular structure of thiazole orange (TO). (b) Photograph of TO-loaded bio-mof-1 powders under natural light. S-3

4 Figure S5. Thermogravimetric analysis (TGA) curves (a) and the corresponding differential curves (b) of Rh B, bio-mof-1 and Rh The valley at 290 C in (b) corresponds to the sublimation of Rh B. There was no substantial weight loss at 290 C in both of bio-mof-1 and Rh B@bio-MOF-1. The result indicates that the confinement effect of MOF channels enhanced the thermal stability of Rh B molecules. Figure S6. Emission spectra of Rh@bio-MOF-1 with different dye concentrations excited at 450 nm under ambient conditions. (a) Rh = Rh 123; (b) Rh = Rh 6G; (c) Rh = Rh B. S-4

5 Figure S7. Concentration-dependent absorption efficiencies, IQE and EQE in composites. (a) Rh = Rh 123; (b) Rh = Rh 6G; (c) Rh = Rh B. Figure S8. Concentration-dependent peak wavelengths in Rh@bio-MOF-1. The solid lines represent the fitting curves using the Eq. (1). (a) Rh = Rh 123; (b) Rh = Rh 6G; (c) Rh = Rh B. S-5

6 Figure S9. (a) Absorption spectra and (b) UV-Vis standard curve at 552 nm of Rh B in DMF. The Beer-Lambert law demonstrates that the absorbance of dye solution is proportional to dye concentration in the appropriate range of concentration. According to the standard curve, the concentration of an unknown solution can be determined easily. Hence, the dye loading efficiency in bio-mof-1 can be quantified based on the method mentioned in Experimental Section. Figure S10. (a) Temperature-dependent PL intensity and (b) thermal stability in Rh@bio-MOF-1 excited at 450 nm under ambient conditions. S-6

7 Figure S11. Time-resolved emission decay curves in (a) Rh = Rh 123, monitored at 565 nm; (b) Rh = Rh 6G, monitored at 580 nm; (c) Rh = Rh B, monitored at 600 nm. Table S1. Rh B loading efficiency in bio-mof-1 at different Rh B concentrations. Sample No C 0 (mg/ml) C t (mg/ml) -- a) Theoretical η <2 % <4 % <8 % <16 % <32 % <64 % Experimental η % % % % *C 0 : initial concentration of Rh B; C t : concentration of supernatant after loading; a) no available data; η refers to the loading efficiency. S-7