This is the peer reviewed version of the following article: Marta Rubio‐Martinez … [et al.], Freezing the non- classical crystal growth of a coordination polymer using controlled dynamic gradients. Adv. Mater., 28: 8150- 8155, which has been published in final form at https://doi.org/10.1002/adma.201506462 This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. Submitted to 1 DOI: 10.1002/adma. Freezing the non-classical crystal growth of a coordination polymer using controlled dynamic gradients By Marta Rubio-Martinez, Inhar Imaz, Neus Domingo, Afshin Abrishamkar, Tiago Sotto Mayor, René M. Rossi, Carlos Carbonell, Andrew J. deMello, David B. Amabilino, Daniel Maspoch, * and Josep Puigmartí-Luis * [*] Prof. D. Maspoch Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and The Barcelona Institute of Science and Technology, Campus UAB, Bellaterra, 08193 Barcelona, Spain Institució Catalana de Recerca i Estudis Avançats (ICREA) 08100 Barcelona, Spain. E-mail: daniel.maspoch@icn.cat [*] Dr. J. Puigmarti-Luis Empa, Swiss Federal Laboratories for Materials Science and Technology Lerchenfeldstrasse 5, CH-9014 St. Gallen, Switzerland E-mail: josep.puigmarti@empa.ch Dr. M. Rubio-Martinez. Dr. I. Imaz, Dr. N. Domingo, Dr. C. Carbonell Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and The Barcelona Institute of Science and Technology, Campus UAB, Bellaterra, 08193 Barcelona, Spain A. Abrishamkar, Dr. T. Sotto Mayor, Dr. R. M. Rossi Empa, Swiss Federal Laboratories for Materials Science and Technology Lerchenfeldstrasse 5, CH-9014 St. Gallen, Switzerland A. Abrishamkar, Prof. A. J. deMello Institute of Chemical and Bioengineering Department of Chemistry and Applied Biosciences, ETH Zurich, Zurich, Switzerland. Prof. D. B. Amabilino School of Chemistry, The University of Nottingham University Park, NG7 2RD, UK. Keywords: Coordination polymers, crystal growth, microfluidics, out-of-equilibrium structures.