1) I want to make donation in my grandmother's name to the senior home. I just want to make donation out of altruistism/goodwill/benevolence.
2) I just want to make donation altruistically without expecting anything in return.
3) My reason for making donation is purely for altruistic reasons.
4) My reason for making donation is motivated by altruistic reasons.
Hope somebody can help me check the above sentences and see if they need any correction. Thanks.