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16 protocols using titanium tetrabutoxide

1

Synthesis and Characterization of Zn/Co DMC Catalyst

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CL (99%) and EG (99%) were purchased from Alfa Aesar (Seoul, Republic of Korea). Polymerization grades of DMT and PTMEG were donated by Kolon Industries Co. (Gumi, Republic of Korea) and used after drying. Irganox 1010 and titanium tetrabutoxide (TBT; 97%) were purchased from Sigma-Aldrich (Seoul, Republic of Korea). Reagent grade chloroform, dichloromethane, diethyl ether, ethanol, hexane, and phenol were purchased from Dae Jung Chemical Co. (Daejeon, Republic of Korea) and distilled prior to use. Trifluoracetic acid (TFA; 99%) and 1,1,2,2-tetrachloroethane (97%) were purchased from Tokyo Chemical Industries (Tokyo, Japan) and used without further purification. The Zn/Co DMC catalyst was prepared using diethyl malonate (DEM) as a complexing agent and Pluronic P123 ((EO)20(PO)70(EO)20) [PEO-b-PPO-b-PEO copolymer, PEO = poly(ethylene oxide), PPO = poly(propylene oxide)] as a co-complexing agent following a previously reported procedure [28 (link)]. The experimental formula of the catalyst is Zn1.99Co(CN)6.25 ·0.51DEM·0.03P123·1.63H2O·1.47Cl.
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2

Synthesis and Characterization of Polyurethane

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Polymerization grade of NDC, BDO and PTMEG were donated by the Kolon Industries Co. (Gumi, Korea) and used after drying. Irganox 1010, titanium tetrabutoxide (TBT, 97%), sodium methoxide (95%), diethanolamine (98%) were purchased from Sigma-Aldrich (Seoul, Korea) and were used without further purification. Reagent grade of dichloromethane, chloroform, hexane, diethyl ether, and ethanol purchased from Dae Jung Chemical Co. (Daejeon, Korea) were distilled according to standard procedures. A commercial-grade soybean oil purchased from Ottogi Co. (Anyang, Korea) and triflouroacetic acid (TFA) (99%) and 1,1,2,2-tetrachloroethane (97%) purchased from Tokyo Chemical Industries (Tokyo, Japan) were used without further purification.
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3

Synthesis of TFDCA and TiO2 Precursors

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TFDCA (97%) was purchased from TCI (Tokyo, Japan). Hexafluoro-2-propanol, chloroform, methanol, BD (99%), titanium tetrabutoxide (TBT, 97%) and titanium isopropoxide (TTIP, 97%) were obtained from Sigma Aldrich (Saint Louis, MO, USA). TBT and TTIP were both distilled before use, while other products and used as received.
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4

Synthesis of Thiophene-based Materials

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2,5-thiophenedicarboxylic acid (2,5-TDCA) was purchased from TCI (Tokyo, Japan), titanium tetrabutoxide (TBT), titanium isopropoxide (TIP), 1,3-propanediol (PD), 1,4-butanediol (BD), 1,5-pentanediol (PeD), and 1,6-hexanediol (HD) were purchased from Sigma-Aldrich (Milan, Italy). All reagents were used as received.
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5

Synthesis and Characterization of AuQDs for Photovoltaic Applications

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Three different types of AuQDs were obtained from Dai Nippon Toryo Co., Ltd. (Japan): B-AuQDs (mixed 5 and 8 Au atoms), G-AuQDs (13 Au atoms) and R-AuQDs (25 Au atoms). Poly(3,4-ethylenedioxythiophene) : poly(styrene sulfonate) (PEDOT : PSS, Clevios™ HTL Solar) was purchased from Heraeus (Germany). Poly(3-hexylthiophene-2,5-diyl) (P3HT, greater than 99%), [6,6]-phenyl C61 butyric acid methyl ester (PCBM, greater than 99%), nitric acid (HNO3, 60%), hydrochloric acid (HCl, 37%), titanium tetrabutoxide (97%), 1,2-dichlorobenzene (99%), ethanol (99.5%) and acetone (AR grade) were purchased from Sigma-Aldrich (Japan). An ITO-coated glass slide (conductivity of 10 Ω cm−2) was purchased from Furuuchi Chemical (Japan).
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6

Synthesis and Purification of 2,4-DMF

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Dimethyl 2,4-furandicarboxylate (2,4-DMF)
was synthesized according to the procedure reported previously.49 (link) Furthermore, it was purified to the monomer
grade by repeated recrystallization from methanol (2× times);
2,5-furandicarboxylic acid 98% (2,5-FDCA) (Carbosynth Ltd., Compton,
Berkshire, U.K.), 1,4-butanediol (BD), titanium tetrabutoxide (TBT),
and titanium isopropoxide (TIP) (Sigma-Aldrich, Saint Louis, MO) were
used as purchased.
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7

Synthesis of Polyester Precursors

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TFDCA (97%) was purchased from TCI (Tokyo, Japan), whereas FDCA (98%) from CHEMOS GmbH & Co. K (Regenstauf, Germany). 1,3-propanediol (1,3-PD), hexafluoro-2-propanol, chloroform, methanol, BD (99%), titanium tetrabutoxide (TBT, 97%) and titanium isopropoxide (TTIP, 97%) were obtained from Sigma Aldrich (St. Louis, MO, USA). TBT and TTIP were both distilled before use, while other products were used as received.
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8

Enzymatic Synthesis of Polyesters

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Sebacic acid (Se) and dimethyl terephthalate (DMT) were purchased from Daejung Chemical & Metals Co., Ltd. (Siheung, Republic of Korea). 1,4-Butanediol (BDO) was purchased from SK Chemicals (Seoul, Republic of Korea). Titanium tetrabutoxide (TBT), pentaerythritol (PE), phosphate buffer solution (pH = 7.4), and lipase from pseudomonas cepacia (>30 U/mg) were purchased from Sigma-Aldrich (Saint Louis, MO, USA).
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9

Synthesis of Chiral Polyester Materials

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(1R,3S)-(+)-Camphoric acid (CA) (J&K Scientific), trans-1,4-cyclohexanedicarboxylic acid (1,4-CHDA) (Fluorochem), 1,4-butanediol (BD), titanium tetrabutoxide (TBT) and titanium isopropoxide (TIP) (Sigma Aldrich) were all used as purchased.
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10

Synthesis of trans-DMCE via Transesterification

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1,4-dimethylcyclohexanedicarboxylate (DMCE), containing 99% trans isomer (TCI Europe, Zwijndrecht, Belgium), 1,3-propanediol (1,3-PD), neopentyl glycol (NPG), and titanium tetrabutoxide (Ti(OBu)4) (Sigma Aldrich, Milan, Italy) were used as supplied, without any preliminary purification. Only the catalyst Ti(OBu)4 was distilled before use.
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