Complex Sequence-Defined Heteropolymers Enable Controlled Film Growth in Layer-By-Layer Assembly

被引:0
作者
Barman, Ranajit [1 ,2 ]
Tschopp, Michel [2 ]
Charles, Laurence [3 ]
Decher, Gero [2 ]
Felix, Olivier [2 ]
Lutz, Jean-Francois [1 ]
机构
[1] Univ Strasbourg, CNRS, UMR 7006, ISIS,Lab Chem Informat Macromol, 8 Allee Gaspard Monge, F-67000 Strasbourg, France
[2] Univ Strasbourg, Inst Charles Sadron UPR22, CNRS, 23 Rue Loess, F-67034 Strasbourg 2, France
[3] Aix Marseille Univ, Inst Rad Chem, CNRS, UMR 7273, F-13397 Marseille 20, France
关键词
data storage; digital polymers; layer-by-layer assembly; sequence-controlled polymers; thin films; ENCODED POLYMERS; INFORMATION; MACROMOLECULES; STORAGE;
D O I
10.1002/marc.202400482
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
Digitally-encoded poly(phosphodiesters) (d-PPDE) with highly complex primary structures are evaluated for layer-by-layer (LbL) assembly. To be easily decoded by mass spectrometry (MS), these digital polymers contain many different monomers: 2 coding units allowing binary encryption, 1 cleavable spacer allowing controlled MS fragmentation, and 3 mass tags allowing fragment identification. These complex heteropolymers are therefore composed of 6 different motifs. Despite this strong sequence heterogeneity, it is found that they enable a highly controlled LbL film formation. For instance, a regular growth is observed when alternating the deposition of negatively-charged d-PPDE and positively-charged poly(allyl amine hydrochloride) (PAH). Yet, in this approach, the interdistance between consecutive coded d-PPDE layers remains relatively small, which may be an issue for data storage applications, especially for the selective decoding of the stored information. Using poly(sodium 4-styrene sulfonate) (PSS) as an intermediate non-coded polyanion, it is shown that a controlled interdistance between d-PPDE layers can be easily achieved, while still maintaining a regular LbL growth. Last but not least, it is found in this work that d-PPDE of relatively small molecular weight (i.e., significantly smaller than those of PAH and PSS) still enables a controlled LbL assembly. Nano-organized thin films containing digital layers are prepared by layer-by-layer deposition of digitally-encoded poly(phosphodiester)s with non-coded polyelectrolytes such as poly(allyl amine hydrochloride) and poly(sodium 4-styrene sulfonate). Despite the sequence heterogeneity of the digital polymer and the differences in molecular weight between coded and non-coded polyelectrolytes, a linear film growth is observed, thus resulting in the formation of well-segregated digital strata. image
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