N n dibutyl 1 6 hexanediamine

Tecoflex SG-80A and Tecophilic SP-60D-20 were purchased from Lubrizol Advanced Materials Inc. (Cleveland, OH). Anhydrous tetrahydrofuran (THF), anhydrous acetonitrile, sodium chloride, potassium chloride, sodium phosphate dibasic, and potassium phosphate monobasic were products of Sigma-Aldrich Chemical Company (St. Louis, MO). Poly(D,L-lactide-co-glycolide) 5050DLG1A (1-2 week hydrolysis rate), 5050DLG7E (1-2 month hydrolysis rate), and 6535DLG7E (3-4 month hydrolysis rate) were obtained from SurModics Pharmaceuticals Inc. (Birmingham, AL). N,N’-Dibutyl-1,6-hexanediamine (DBHD) was purchased from Alfa Aesar (Ward Hill, MA). DBHD/N₂O₂ was synthesized by treating DBHD with 80 psi NO gas purchased from Cryogenic Gases (Detroit, MI) at room temperature for 48 h, as previously described [46 (link)]. Phosphate buffered saline (PBS), pH 7.4, containing 138 mM NaCl, 2.7 mM KCl, and 10 mM sodium phosphate was used for all in vitro experiments.

Anhydrous tetrahydrofuran (THF), anhydrous acetonitrile, sodium chloride, potassium chloride, sodium phosphate dibasic, and potassium phosphate monobasic were purchased from Sigma-Aldrich Chemical Company (St. Louis, MO). Poly(D,L-lactide-co-glycolide) materials with ester end groups (product numbers 50:50-DLG-7E and 65:35-DLG-7E) were obtained from SurModics Pharmaceuticals Inc. (Birmingham, AL). N,N′-Dibutyl-1,6-hexanediamine (DBHD) was purchased from Alfa Aesar (Ward Hill, MA). DBHD/NONO was synthesized by treating DBHD with 80 psi NO gas purchased from Cryogenic Gases (Detroit, MI) at room temperature for 48 h, as previously described [45 (link)]. Elast-eon^™ E2As was obtained from AorTech International, plc (Scoresby, Victoria, Australia).