Supporting Information Control of the Optical Properties of Quantum Dots by Surface Coating with Calix[n]arene Carboxylic Acids Takashi Jin,* Fumihiko Fujii, Eiji Yamada, Yoshinobu Nodasaka, Masataka Kinjo Experimental details Materials: calix[n]arenes (n = 4, 6, 8) were purchased from Tokyo Organic Chemicals (Japan). Calix[n]arene carboxylic acids (1- 3) were synthesized according to the literature. [1,2] Cadmium oxide (CaO), stearic acids, ZnEt 2 (1M hexane solution), and tri-n- octylphosphine oxide (TOPO), hexadecylamine (HDA) were purchased from Wako Chemicals (Japan). Selenium (powder, 99. 999 %), hexamethyldisilathiane ((TMS) 2 S), tri-n-octylphosphine (TOP) were purchased from Aldrich. Tri-n-octylphosphine selenide (TOP-Se, 1 M) was prepared by stirring selenium powder (80 mg) in tri- octylphosphine (1 mL) overnight. A Zn/S stock solution was prepared with 1 mL of (TMS) 2 S (5 mmol) and 5 mL of ZnEt 2 hexane solution (5 mmol) in 4 mL TOP solution. TOPO capped CdSe/ZnS (core-shell) QDs: the QDs were synthesized by a modified method using the reported procedures. [3-5] The mixture of CdO (13 mg, 0.1 mmol) and stearic acid (250 mg) was loaded into a 25 mL three-necked flask and heated to 250 ℃ under Ar flow. After CdO was completely dissolved, the mixture was allowed to cool to room temperature. Then TOPO (3 g) and HDA (1g) were added and the mixture was heated to 200 ℃. At this temperature, 0.1 mL of TOP-Se solution (1M) was quickly injected by means of a syringe under stirring. By monitoring of the growth of CdSe nanoparticles with the aid of their fluorescence spectra, the formation of three types of the QDs (515, 555, or 570 nm emission) was checked. When the CdSe nanoparticles were formed, the solution was cooled to 100 ℃. Then the temperature of the CdSe QD solution was increased to the temperature at which the ZnS shell coating should be performed: 150 ℃ for CdSe (515 nm emission), 180 ℃ for CdSe (550 nm emission), and 200 ℃ for CdSe (570 nm emission). At each of the S 1