Non-exponential 1H and 2H NMR relaxation and self-diffusion in asphaltene-maltene solutions

This dataset contains data to obtain the NMR relaxation parameters T1 and T2, as well as the self-diffusion coefficients of different small molecules (maltenes) in a solvent in the absence and presence of a high asphaltene concentration. Therefore, different maltenes were chosen (see README file) and solutions consisting of 95vol% solvent and 5vol% maltene were prepared (Pure). The solvents were benzene-d6 and benzene for proton-bearing maltenes and completely deuterated maltenes, respectively. The relaxation parameters of the maltenes protons/deuterons were measured using the inversion recovery (T1) and the Carr-Purcell-Meiboom-Gill (T2) pulse sequence, while the stimulated echo pulse sequence was used to determine the self-diffusion coefficient. To determine further the parameters in presence of an asphaltene, the same solutions containing a high concentration of asphaltene (150g/l) were prepared (Slb). The experiments were conducted at room temperature (20 °C) at a magnetic field strength of 7.05T. This dataset contains the raw and processed data of these experiments.

本数据集汇集了获取核磁共振弛豫参数T1和T2，以及不同小分子（焦糖状物质）在溶剂中无沥青质高浓度及存在高浓度沥青质条件下的自扩散系数的数据。据此，选取了不同的焦糖状物质（详见README文件），并制备了由95体积百分比溶剂与5体积百分比焦糖状物质组成的溶液（纯溶液）。针对含质子及完全去氘的焦糖状物质，分别使用苯-氘-6和苯作为溶剂。通过反转恢复（T1）和Carr-Purcell-Meiboom-Gill（T2）脉冲序列测量了焦糖状物质质子/氘核的弛豫参数，而采用激发回波脉冲序列测定自扩散系数。为了进一步确定沥青质存在条件下的参数，制备了含有高浓度沥青质（150g/l）的相同溶液（Slb溶液）。实验在室温（20°C）及7.05T磁场强度下进行。本数据集包含了上述实验的原始及处理后的数据。