Poly [(R)-(-)-3-(1-pyrrolyl)propyl-N-(3,5-dinitrobenzoyl)-alpha-phenylglycina teI films of various thicknesses were galvanostatically deposited on ITO/glass electrodes using different deposition charges (Q(dep)), and their electrochromic properties were investigated. Depending on the Q(dep) employed, the polymeric films presented green-yellow or green-brown colours in the reduced state (lambda(max) at 350 nm and shoulder at 390 nm) and a blue-grey colour in the oxidised state (lambda(max) at 460 nm) with high absorption in the near infrared region (lambda(max) > 800 nm). Whilst films deposited with a Q(dep) of 40 mC cm(-2) presented the highest chromatic contrast (20%), films with a Q(dep) of 50 mC cm(-2) exhibited greater stability to redox cycling (ca. 350 cycles), high coulombic efficiency (> 73%) and good optical memory in the reduced state (E = 0.0 V). (c) 2006 Elsevier Ltd. All rights reserved.