Synthesis, Characterizations, and Morphological Studies of Polyoxometalate‐Containing Rod–Coil Diblock Copolymers1. Issue 10 (7th January 2013)

• Record Type: Journal Article
• Authors: Chakraborty, Sanjiban; Jin, Lu; Li, Yong; Liu, Yucong; Dutta, Tanmoy; Zhu, Da‐Ming; Yan, Xingzhong; Keightley, Andrew; Peng, Zhonghua
• Other Names: Kortz Ulrich sponsoringEditor.; Liu Tianbo sponsoringEditor.
• Is Part Of: European journal of inorganic chemistry. Issue 10/11(2013)
• Page Start: 1799
• Page End: 1807
• Publication Date: 2013-01-07
• Subjects: Polyoxometalates -- Conducting materials -- Conjugated polymers -- Diblock copolymers -- Click chemistry -- Photovoltaics -- Pi interactions; Chemistry, Inorganic -- Periodicals; Organometallic chemistry -- Periodicals; Bioinorganic chemistry -- Periodicals; Solid state chemistry -- Periodicals; 546
• DOI: 10.1002/ejic.201201127
• Languages: English
• ISSNs: 1434-1948

Abstract

Abstract: A set of hybrid rod–coil diblock copolymers containing different sizes of poly(3‐hexylthiophene‐2, 5‐diyl) (P3HT) as the rod block and a polystyryl‐type (PS) coil block with covalently linked polyoxometalates (POMs) as side chains have been synthesized. The P3HT rod blocks, synthesized using Grignard metathesis polymerization, and the PS coil block, prepared by atom transfer radical polymerization were successfully coupled using "click" chemistry to form the rod–coil diblock copolymers (PS‐PTn). POM cluster attachment was performed on the diblock copolymers through a post‐polymerization functionalization approach. The thin film morphology of the diblock copolymers prior to cluster attachment shows a strong dependence on the solvent and the size of the P3HT block. Following cluster attachment, the hybrid diblock copolymers show much less solvent and size dependence in phase‐separated morphologies of their pristine films. The sporadic and isolated conducting domains seen in the pristine films change to widespread worm‐like conducting networks after thermal annealing; such morphologies are conducive to photovoltaic properties. Abstract : Hybrid rod–coil diblock copolymers containing P3HT as the rod block and a POM‐modified polystyryl‐type coil block have been synthesized and shown to exhibit nanophase separation after thermal annealing.